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Multivariate analysis
Kendall, Maurice G., (1975)
Multivariate statistical methods
Morrison, Donald Franklin, (1967)
An introduction to multivariate statistical analysis
Anderson, Theodore W., (1958)
A dictionary of statistical terms
Marriott, Francis H., (1990)
Unsupervised Classification of Chemical Compounds
Toscano, P. Guttiérrez, (1999)
Projection indices and multimodality for mixtures of normal distributions
Eslava, G., (1999)