Everitt, B.S. (2002) The Cambridge Dictionary of Statistics, CUP, ISBN 0-521-81099-X /wiki/ISBN_(identifier)
K. V. Mardia, J. T. Kent and J. M. Bibby (1979). Multivariate Analysis. Academic Press. ISBN 0-12-471252-5. Especially chapters 11 and 12. 0-12-471252-5
K. V. Mardia, J. T. Kent and J. M. Bibby (1979). Multivariate Analysis. Academic Press. ISBN 0-12-471252-5. Especially chapters 11 and 12. 0-12-471252-5