In this section we will include some references in relation to the theory or application of the methods in the package. In blue the references related to the author of the program.


Gabriel KR (1971) The biplot graphic display of matrices with application to principal component analysis. Biometrika 58(3):453–467.

Gabriel KR (1998) Generalised bilinear regresin. Biometrika 85(3):689–700

Galindo Villardon, M. (1986). Una alternativa de representacion simultanea: HJ-Biplot. Qüestiió. 1986, vol. 10, núm. 1.

Gabriel, K. R. (2002). Le biplot-outil d'exploration de données multidimensionnelles. Journal de la Société française de statistique143(3-4).

Gabriel KR, Zamir S (1979) Lower rank approximation of matrices by least squares with any choice of weights. Technometrics 21(4):489–498

Gower J, Hand D (1996) Biplots. Monographs on statistics and applied probability. 54. London: Chapman and Hall., 277 pp.

Hernández-Sánchez, J. C., & Vicente-Villardón, J. L. (2017). Logistic biplot for nominal data. Advances in Data Analysis and Classification11(2), 307-326.

Vicente-Villardón, J. L. (1992). Una alternativa a las técnicas factoriales clásicas basada en una generalización de los métodos Biplot (Doctoral dissertation, Tesis. Universidad de Salamanca. España. 248 pp.[Links]).

Demey J, Vicente-Villardon JL, Galindo MP, Zambrano A (2008) Identifying molecular markers associated with classification of genotypes using external logistic biplots. Bioinformatics 24(24):2832–2838

Vicente-Villardon JL, Galindo MP, Blazquez-Zaballos A (2006) Logistic biplots. Multiple Correspondence Analysis and related methods pp 491–509.

Sepúlveda, R., Vicente‐Villardón, J. L., & Galindo, M. P. (2008). The Biplot as a diagnostic tool of local dependence in latent class models. A medical application. Statistics in medicine27(11), 1855-1869.

Amaro, I. R., Vicente-Villardón, J. L., & Galindo-Villardón, M. P. (2004). Manova Biplot para arreglos de tratamientos con dos factores basado en modelos lineales generales multivariantes. Interciencia29(1), 26-32.

Vallejo-Arboleda, A., Vicente-Villardón, J. L., & Galindo-Villardón, M. P. (2007). Canonical STATIS: Biplot analysis of multi-table group structured data based on STATIS-ACT methodology. Computational statistics & data analysis51(9), 4193-4205.

Sánchez, J. C. H., & Vicente-Villardón, J. L. (2013). Logistic biplot for nominal data. arXiv preprint arXiv:1309.5486.

Gabriel, K. R., Galindo, M. P., & Vicente-Villardón, J. L. (1998). Use of biplots to diagnose independence models in three-way contingency tables. Visualization of Categorical Data. Academic Press. London.

Santos, C., Munoz, S. S., Gutierrez, Y., Hebrero, E., Vicente, J. L., Galindo, P., & Rivas, J. C. (1991). Characterization of young red wines by application of HJ biplot analysis to anthocyanin profiles. Journal of Agricultural and food chemistry39, (6), 1086-1090.

Rivas-Gonzalo, J. C., Gutiérrez, Y., Polanco, A. M., Hebrero, E., Vicente, J. L., Galindo, P., & Santos-Buelga, C. (1993). Biplot analysis applied to enological parameters in the geographical classification of young red wines. American journal of enology and viticulture44, (3), 302-308.

Varas, M. J., Vicente‐Tavera, S., Molina, E., & Vicente‐Villardón, J. L. (2005). Role of canonical biplot method in the study of building stones: an example from Spanish monumental heritage. Environmetrics16(4), 405-419.

Martı́n-Rodrı́guez, J., Galindo-Villardón, M. P., & Vicente-Villardón, J. L. (2002). Comparison and integration of subspaces from a biplot perspective. Journal of statistical planning and inference102, (2), 411-423.

Frutos, E., Galindo, M. P., & Leiva, V. An interactive biplot implementation in R for modeling genotype-by-environment interaction. Stochastic Environmental Research and Risk Assessment, 1-13.

Cárdenas, O., Noguera, C., Galindo, M. P., & Vicente-Villardón, J. (2003). El uso de información externa en aproximaciones Biplot. Revista Venezolana de Análisis de Coyuntura9(2), 257-276.

Cárdenas, O., Noguera, C., Galindo, P., & Vicente-Villardón, J. L. (2006). Alternativa a la regresión con componentes principales basada en biplot de regresión. Interciencia31(3), 160-167.

Cárdenas, O., Vicente-Villardón, J.  & Galindo, P. (2007). Los métodos Biplot: evolución y aplicaciones. Revista Venezolana de Análisis de Coyuntura13(1), 279-303.

Vicente-Villardón, J. L. (2011). Logistic Biplots for Binary, Nominal and Ordinal Data. Agrocampus Ouest, Rennes FRANCE, 63.

Vallejo, A., Vicente, J. L., Galindo, P., Fernández, M., Fernández, C., & Becares, E. (2008). Analysis of Time Evolution for Group Structured Data: Canonical Dual STATIS and Doubly Multivariate Repeated Measures Model.Revista Colombiana de Estadística31(2), 321-340.

Fernández Gómez, M. J., Galindo Villardón, M. P., Barrera Mellado, I., Vicente Villardón, J. L., & Martín Casado, A. M. (1996). Alternativa al análisis canónico de correspondencias basada en los métodos Biblot. Mediterránea. Serie de Estudios Biológicos, Época II, n. 15 (1996); pp. 63-71.

PINZÓN, L. M. (2012). Biplot consenso para análisis de tablas múltiples (Vol. 300). Universidad de Salamanca. (Doctoral Thesis, Director: Vicente-Villardon, J.L.)

Sanchez, Julio Cesar Hernandez, Jose Luis Vicente-Villardon, and Maintainer Julio Cesar Hernandez Sanchez. "Package ‘OrdinalLogisticBiplot’." (2013).

Sanchez, Julio Cesar Hernandez, Jose Luis Vicente-Villardon, and Maintainer Julio Cesar Hernandez Sanchez. "Package ‘NominalLogisticBiplot’.”

Fernández-Gómez, M. J., Galindo, M. P., & Vicente-Villardón, J. L. (2011). Constrained Unfolding Analysis Based on a Gaussian Response Model for Gradient Analysis in Ecological Studies. (in preparation)

Sierra, C., Ruíz-Barzola, O., Menéndez, M., Demey, J. R., & Vicente-Villardón, J. L. (2017). Geochemical interactions study in surface river sediments at an artisanal mining area by means of Canonical (MANOVA)-Biplot. Journal of Geochemical Exploration175, 72-81.

Applications using the program, including previous versions (some forgot the citation)

Gallego‐Alvarez, I., Ortas, E., Vicente‐Villardón, J. L., & Álvarez Etxeberria, I. (2017). Institutional Constraints, Stakeholder Pressure and Corporate Environmental Reporting Policies. Business Strategy and the Environment.

Cañueto, J., Cardeñoso‐Álvarez, E., García‐Hernández, J. L., Galindo‐Villardón, P., Vicente‐Galindo, P., Vicente‐Villardón, J. L., ... & Fernández‐López, E. (2017). MicroRNA (miR)‐203 and miR‐205 expression patterns identify subgroups of prognosis in cutaneous squamous cell carcinoma. British Journal of Dermatology177(1), 168-178.

Castro, S. A., & González, A. G. (2017). Internet and Social Media in the Prevention Journalism Discourse. A Theoretical Proposal and Main Magnitudes. In Media and Metamedia Management (pp. 105-111). Springer International Publishing.

Esteban, V. A., Villardón, M. P. G., & Sánchez, I. M. G. (2017). Cultural values on CSR patterns and evolution: A study from the biplot representation. Ecological Indicators81, 18-29.

González-Martín, M. I., Vicente-Tavera, S., Revilla, I., Vivar-Quintana, A. M., González-Pérez, C., Hierro, J. H., & Lobos-Ortega, I. (2016). The role of the canonical biplot method in the study of volatile compounds in cheeses of variable composition. Grasas y Aceites67(1), 112.

Gallego-Á lvarez, I., Cuadrado-Ballesteros, B., & Mejía-Rosario, N. (2016). IFRS implementation at international level: a biplot analysis. International Journal of Accounting, Auditing and Performance Evaluation12(4), 422-444.

TEJEDOR-FLORES, N., GALINDO-VILLARDÓN, P., & VICENTE-GALINDO, P. (2016). Sustainability Multivariate Analysis Based On The Global Reporting Initiative (gri) Framework, Using As A Case Study: Brazil Compared To Spain And Portugal. Urban Regeneration & Sustainability, 307.

Lahoz, I., Pérez-de-Castro, A., Valcárcel, M., Macua, J. I., Beltrán, J., Roselló, S., & Cebolla-Cornejo, J. (2016). Effect of water deficit on the agronomical performance and quality of processing tomato. Scientia Horticulturae200, 55-65.

Ballesteros, B. C., Ferrero, J. M., & Marques, M. D. C. (2016). Functional Decentralization in Portuguese Local Governments. Public Administration Quarterly40(1), 84.

García-Talegón, J., Iñigo, A. C., & Vicente-Palacios, V. (2016). A laboratory simulation of desalting on calcareous building stone with wet sepiolite. Environmental Earth Sciences75(10), 925.

Xavier, A., Freitas, M. B., Rosário, M. D. S., & Fragoso, R. (2016). Disaggregating Statistical Data at Field Level: An Entropy Approach (No. 2016_06). University of Evora, CEFAGE-UE (Portugal).

Cadavid-Ruiz, N., del Río, P., Egido, J., & Galindo, P. (2016). Age Related Changes in the Executive Function of Colombian Children. Universitas Psychologica15(SPE5), 1-10.

Silveira, P., Galindo Villardón, M. P., & Vicente Galindo, M. P. (2016). Análise dos estilos de aprendizagem e da inteligência emocional dos alunos do Instituto Politécnico de Castelo Branco. In VII Congresso Mundial Estilos de Aprendizagem (pp. 455-468). Instituto Politécnico de Bragança.

Eljak, S. A., Hassan, H. A., Gorafi, Y. S., Ahmed, I. A. M., & Ali, M. Z. (2016). Effect of fertilizers application and growing environment on physicochemical properties and bread making quality of Sudanese wheat cultivar. Journal of the Saudi Society of Agricultural Sciences.

Mutwali, N. I., Mustafa, A. I., Gorafi, Y. S., & Mohamed Ahmed, I. A. (2016). Effect of environment and genotypes on the physicochemical quality of the grains of newly developed wheat inbred lines. Food science & nutrition4(4), 508-520.

Martí, R., Leiva-Brondo, M., Lahoz, I., Campillo, C., Cebolla-Cornejo, J., & Roselló, S. (2018). Polyphenol and l-ascorbic acid content in tomato as influenced by high lycopene genotypes and organic farming at different environments. Food Chemistry239, 148-156.

Alende Castro, S., & Román Portas, M. (2016). Estudio de la influencia del Periodismo de Prevención en la comunicación institucional. Llamada de atención a la Administración. Ámbitos, (34).

Fredes, A., Roselló, S., Beltrán, J., Cebolla‐Cornejo, J., Pérez‐de‐Castro, A., Gisbert, C., & Picó, M. B. (2017). Fruit quality assessment of watermelons grafted onto citron melon rootstock. Journal of the Science of Food and Agriculture97(5), 1646-1655.

Lahoz, I., Leiva-Brondo, M., Martí, R., Macua, J. I., Campillo, C., Roselló, S., & Cebolla-Cornejo, J. (2016). Influence of high lycopene varieties and organic farming on the production and quality of processing tomato. Scientia Horticulturae204, 128-137.

Sánchez-Lopez, C., & de Paz Báñez, M. A. (2016). UnqUeality and Poverty in Great recession. differences between eU coUntries. Revista de economía mundial44, 93-124.

Alpízar, C. A. (2017). Análisis estadístico de la elección presidencial 2014 en Costa Rica. Pensamiento Actual17(28), 78-87.

Pan, J., Liu, S., Farkas, M., Consugar, M., Zack, D. J., Kozak, I., ... & Al Kahtani, E. (2016). Serum molecular signature for proliferative diabetic retinopathy in Saudi patients with type 2 diabetes. Molecular vision22, 636.

Todd, J., Sandhu, H., Hale, A., Glaz, B., & Wang, J. (2017). Phenotypic evaluation of a diversity panel selected from the World Collection of Sugarcane (Saccharum spp.) and Related Grasses. Maydica62(2017), M19.

Gallego-Álvarez, I., Galindo-Villardón, M. P., & Rodríguez-Rosa, M. (2015). Analysis of the sustainable society index worldwide: A study from the biplot perspective. Social Indicators Research120(1), 29-65.

Castellanos-Martín, A., Castillo-Lluva, S., del Mar Sáez-Freire, M., Blanco-Gómez, A., Hontecillas-Prieto, L., Patino-Alonso, C., ... & del Mar Abad-Hernández, M. (2015). Unraveling heterogeneous susceptibility and the evolution of breast cancer using a systems biology approach. Genome biology16(1), 40.

Cuadrado-Ballesteros, B., & Vaquero-Cacho, L. A. (2015). The “need to know” and the lack of online transparency among political parties. Transforming Government: People, Process and Policy9(1), 85-103.

Ortas, E., Álvarez, I., Jaussaud, J., & Garayar, A. (2015). The impact of institutional and social context on corporate environmental, social and governance performance of companies committed to voluntary corporate social responsibility initiatives. Journal of Cleaner Production108, 673-684.


Limón, R. I., Peñas, E., Torino, M. I., Martínez-Villaluenga, C., Dueñas, M., & Frias, J. (2015). Fermentation enhances the content of bioactive compounds in kidney bean extracts. Food chemistry172, 343-352.

Gallego-Alvarez I, Vicente-Villardon JL (2012) Analysis of environmental indicators in international companies by applying the logistic biplot. Ecological Indicators 23(0):250 – 261, DOI

Santana, M. A., Romay, G., Matehus, J., Villardón, J. L., & Demey, J. R. (2009). simple and low-cost strategy for micropropagation of cassava (Manihot esculenta Crantz). African Journal of Biotechnology 8, (16).

Zambrano, A. Y., Martínez, G., Gutiérrez, Z., Manzanilla, E., Vicente-Villardón, J. L., & Demey, J. R. (2007). Marcador RAPD asociado a la resistencia a Fusarium oxysporum en Musa. Interciencia32(11), 775-779.

Tavera, S. V., Martín, I. R. A., & Villardón, J. L. V. (2000). Estudio comparativo de las características fisico-químicas de los suelos de la Armuña mediante un biplot canónico. In XXV Congreso Nacional de Estadística e Investigación Operativa: Vigo, 4-7 de abril de 2000 (pp. 313-314). Servicio de Publicaciones.

Galindo Villardón, M. P., Vicente Galindo, P., Patino Alonso, C., & Vicente Villardón, J. L. (2007). Caracterización multivariante de los perfiles de las mujeres en situación laboral irregular: el caso de Salamanca. Pecunia, (4), 49-79.

Gutiérrez, Z., Rodríguez, A., Zambrano, A. Y., Fuenmayor, F., Ruiz, L., Moreno, R., ... & Vicente-Villardón, J. L. (2005, October). Genetic diversity of Venezuelan cassava collection. In International Symposium on Biotechnology of Temperate Fruit Crops and Tropical Species 738 (pp. 729-733).

García, A. V., Miliani, A., Rodríguez, D., Zambrano, A. Y., Vicente-Villardón, J. L., & Demey, J. R. (2013). Diversidad genética de la colección venezolana de la familia Caricáceas. Interciencia38(3), 171-178.

González-Martín, M. I., Palacios, V. V., Revilla, I., Vivar-Quintana, A. M., & Hernández-Hierro, J. M. (2017). Discrimination between cheeses made from cow’s, ewe’s and goat’s milk from unsaturated fatty acids and use of the canonical biplot method. Journal of Food Composition and Analysis56, 34-40.

Ferreira, V., Panagopoulos, T., Andrade, R., Guerrero, C., & Loures, L. (2015). Spatial variability of soil properties and soil erodibility in the Alqueva reservoir watershed. Solid Earth6, 383-392.

Lopes, B., Arrebola, J. P., Serafim, A., Company, R., Rosa, J., & Olea, N. (2014). Polychlorinated biphenyls (PCBs) and p, p′-dichlorodiphenyldichloroethylene (DDE) concentrations in maternal and umbilical cord serum in a human cohort from South Portugal. Chemosphere114, 291-302.

Vicente-Galindo P, de Noronha Vaz T, Nijkamp P (2011) Institutional capacity to dynamically innovate: An application to the portuguese case. Technological Forecasting and Social Change 78(1):3 – 12, DOI, URL:

Isabel-María García-Sánchez, José-Valeriano Frías-Aceituno, Luis Rodríguez-Domínguez, Determinants of corporate social disclosure in Spanish local governments, Journal of Cleaner Production, Volume 39, January 2013, Pages 60-72.

Isabel Gallego-Álvarez, Luis Rodríguez-Domínguez, Raquel García-Rubio, Analysis of environmental issues worldwide: a study from the biplot perspective, Journal of Cleaner Production, Volume 42, March 2013, Pages 19-30, ISSN 0959-6526.

Vázquez-de-Aldana, B. R., García-Criado, B., Vicente-Tavera, S., & Zabalgogeazcoa, I. (2013). Fungal Endophyte (Epichloë festucae) Alters the Nutrient Content of Festuca rubra Regardless of Water Availability. PloS one,8(12), e84539.

SIERRA, M. M. (2012). Caracterización bioquímica y microbiológica de un suelo de pradera de «dactylis glomerata» y «medicago sativa» bajo diferentes proporciones de siembra (Vol. 321). Universidad de Salamanca.

Gallego-Álvarez, I., Galindo-Villardón, M. P., & Rodríguez-Rosa, M. Analysis of the Sustainable Society Index Worldwide: A Study from the Biplot Perspective.Social Indicators Research, 1-37.

Martínez-Ferrero, J., & Gallego-Álvarez, I. (2013). Application of the HJ Biplot Methodology to Variation Greenhouse Gas Emissions in International Companies. In Modeling and Simulation in Engineering, Economics, and Management (pp. 10-22). Springer Berlin Heidelberg.

Morillo, F., Díaz-Faes, A. A., González-Albo, B., & Moreno, L. (2014). Do networking centres perform better? An exploratory analysis in Psychiatry and Gastroenterology/Hepatology in Spain. Scientometrics98(2), 1401-1416.

García‐Sánchez, I. M., Rodríguez‐Domínguez, L., & Frias‐Aceituno, J. V. (2013). Evolutions in E‐governance: Evidence from Spanish Local Governments. Environmental Policy and Governance23(5), 323-340.

Iñigo, A. C., García-Talegón, J., Vicente-Tavera, S., Martín-González, S., Casado-Marín, S., Vargas-Muñoz, M., & Pérez-Rodríguez, J. L. (2013). Colour and ultrasound propagation speed changes by different ageing of freezing/thawing and cooling/heating in granitic materials. Cold Regions Science and Technology85, 71-78.

Serafim, A., Lopes, B., Silva, N., Castela, E., Bebianno, M. J., & Castela, G. (2012). Profile analysis of mothers susceptible to contaminant exposure in the Algarve region: Application of the HJ-BIPLOT method. Biometrical Letters,49(1), 57-66.

Mendes, S., FERNÁNDEZ‐GÓMEZ, M. J., GALINDO‐VILLARDÓN, M. P., MORGADO, F., MARANHÃO, P., AZEITEIRO, U., & BACELAR‐NICOLAU, P. (2009). The study of bacterioplankton dynamics in the Berlengas Archipelago (West coast of Portugal) by applying the HJ-biplot method. Arquipélago: Life and Marine Sciences.


López, J. C., & Garrido, M. F. B. (2012). Barça-Madrid: una rivalidad global. Análisis del derbi a través de la prensa escrita española. Estudios sobre el Mensaje Periodístico18(2), 459-474.

Iñigo, A. C., García‐Talegón, J., & Vicente‐Tavera, S. (2014). Canonical biplot statistical analysis to detect the magnitude of the effects of phosphates crystallization aging on the color in siliceous conglomerates. Color Research & Application39(1), 82-87.

Veiga de Cabo, J., & Martín-Rodero, H. (2011). Open Access: new models of scientific publishing in web 2.0 environments. Salud Colectiva7, S19-S27.

Díaz-Faes, A. A., González-Albo, B., Galindo, M. P., & Bordons, M. (2013). HJ-Biplot como herramienta de inspección de matrices de datos bibliométricos.Revista Española de Documentación Científica36(1), e001.

Rodríguez Hernández, I. (2013). Nuevas aportaciones a la caracterización molecular de los gliomas. Tesis Doctoral. Universidad de Salamanca.

Carbonell Asíns, J. A. (2013). Análisis multivariante de la precariedad en España, Italia, Francia, Portugal y Bélgica. Universidad de Salamanca.

Caballero Juliá, D. (2011). El HJ-Biplot como herramienta en el análisis de grupos de discusión. Calidad de vida en la ludopatía: una propuesta sociológica. Universidad de Salamanca.

de Noronha Vaz, T., Galindo, P. V., de Noronha Vaz, E., & Nijkamp, P. (2013). Innovative firms behind the regions: Analysis of regional innovation performance in Portugal by external logistic biplots. European Urban and Regional Studies, 0969776412474675.

de Noronha Vaz, E., de Noronha Vaz, T., & Nijkamp, P. (2013). The Spatial-Institutional Architecture of Firms’ Innovative Behaviour (No. 13-102/VIII). Tinbergen Institute Discussion Paper.

Vaz, E., de Noronha Vaz, T., Galindo, P. V., & Nijkamp, P. (2014). Modelling innovation support systems for regional development–analysis of cluster structures in innovation in Portugal. Entrepreneurship & Regional Development,26(1-2), 23-46.

Galindo, P. V., Vaz, T. D. N., & Nijkamp, P. (2011). Institutional capacity to dynamically innovate: an application to the Portuguese case. Technological Forecasting and Social Change78(1), 3-12.

Hernández Suárez, M. (2011). Estudio de la variación estacional del sabor del tomate. Universidad de Salamanca.

García-Talegón, J., Vicente, M. A., Molina-Ballesteros, E., & Vicente-Tavera, S. (1999). Determination of the origin and evolution of building stones as a function of their chemical composition using the inertia criterion based on an HJ-biplot. Chemical geology153(1), 37-51.

González Cabrera, J. M., Fidalgo Martínez, M. R., Martín Mateos, E. J., & Vicente Tavera, S. (2006). Study of the evolution of air pollution in Salamanca (Spain) along a five-year period (1994–1998) using HJ-Biplot simultaneous representation analysis. Environmental Modelling & Software21(1), 61-68.

López-Plaza, M., López-Moro, F. J., Vicente Tavera, S., & Vicente Villardón, J. L. (2008). Los leucogranitos equigranulares del Domo del Tormes (Zona Centro Ibérica): discriminación geoquımica y significado petrogenético. e. Terra5, 1-16.

Vicente, M. A., & Vicente-Tavera, S. (2001). Clay poultices in salt extraction from ornamental stones: a statistical approach. Clays and clay minerals49(3), 227-235.

Vaz, E., de Noronha, T., & Nijkamp, P. (2014). The Spatial-Institutional Architecture of Innovative Behaviour. In Applied Regional Growth and Innovation Models (pp. 35-50). Springer Berlin Heidelberg.

Martínez-Ruiz, C., Fernandez-Santos, B., Putwain, P. D., & Fernández-Gómez, M. J. (2007). Natural and man-induced revegetation on mining wastes: changes in the floristic composition during early succession. Ecological Engineering,30(3), 286-294.

Galante, E., García-Román, M., Barrera, I., & Galindo, P. (1991). Comparison of spatial distribution patterns of dung-feeding scarabs (Coleoptera: Scarabaeidae, Geotrupidae) in wooded and open pastureland in the Mediterranean “Dehesa” area of the Iberian Peninsula. Environmental Entomology20(1), 90-97.

Iñigo, A. C., López-Moro, F. J., Vicente-Tavera, S., & Rives, V. (2005). Monitoring of origin and evolution of building stones through their major components. Journal of materials in civil engineering17(4), 440-446.

Marreiros, A., Castela, G., Rebelo, E., & Galindo, P. (2010). The Pathological-numeric Codification of Public Hospitals in Portugal: Implementation of Mechanisms to Support the Assessment Process of Hospital Clinical Records and their Relationship with Funding (No. 2010-2). CIEO-Research Centre for Spatial and Organizational Dynamics, University of Algarve.

Castela, E., & Galindo, P. (2010). Ecological Inference for the characterization of electoral turnout: The Portuguese Case (No. 2010-1). CIEO-Research Centre for Spatial and Organizational Dynamics, University of Algarve.

Galindo, M. P., Fernández-Gómez, M. J., Avila-Zarza, C., Del Río, A., & Fernández-Aláez, M. (1999). El análisis HJ–Biplot como herramienta de estudio en un ecosistema acuático. Statistics and Environment, 85-94.

Alcantara, M., & Rivas, C. (2007). The spatial dimensions of left-right polarization in Latin America. POLITICA Y GOBIERNO14(2), 349-390.

Ortega Meder, M. D., Rivas Gonzalo, J. C., Santos Buelga, C., & Vicente, J. L. (1994). Diferenciacion de variedades de uvas tintas por su composicion antocianica. Revista española de ciencia y tecnología de alimentos34.

José Luis Vicente Villardón - Departamento de Estadística - Universidad de Salamanca. (