Wilks' lambda: Cooley, W. W., and Lohnes, P. R. Multivariate Data Analysis. New York: Wiley,1971. p. 175; Morrison, D.F. Multivariate Statistical Methods. Second edition. New York: McGraw-Hill, 1976.p. 222; Harris, R. J. A Primer of Multivariate Statistics. New York: Academic Press, 1975. p. 143
Roy's greatest root: Morrison, D.F. Multivariate Statistical Methods. Second edition. New York: McGraw-Hill, 1976.p. 178; Harris, R. J. A Primer of Multivariate Statistics. New York: Academic Press, 1975. p. 143
Pillai-Bartlett: Morrison, D.F. Multivariate Statistical Methods. Second edition. New York: McGraw-Hill, 1976.p. 223