1. Anderson. T.W. (1951a). The asymptotic distribution of certain characteristic roots and vectors, Proc. Sec. Berkeley Symp. Math. Statist. Prob. (Jerzy Neyman, ed.). University of California Press, Berkeley. 1951. pp. 103–130.
2. Anderson. T.W. (1951b). Estimating linear restrictions on regression coefficients for multivariate normal distributions, Ann. Math. Statist., 22,327–351 (correction. Ann. Statist., 8 (1980). 1400 ).
3. Anderson, T.W. (1984). An Introduction to Multivariate Statistical Analysis Sec. ed. Wiley. New York.
4. Bartlett, M.S. (1947). The general canonical correlation distribution, Ann. Math. Statist.. 18. 1–17.
5. Beltrami. E. (1873). On bilinear functions (Italian). J. Math. (Naples), 11, 98–106.