1. T. W. Anderson, An Introduction to Multivariate Statistical Analysis, 2nd ed., Wiley, New York.
2. Discrimination in the case of zero mean differences;Bartlett;Biometrika,1963
3. A representation of Hotelling's T2 and Anderson's classification statistic W in terms of simple statistics;Bowker,1961
4. Methods and applications of equal-mean discrimination;Desu,1970
5. The biplot graphic display of matrices with application to principal component analysis;Gabriel;Biometrika,1971