1. Anderson, T. W.An introduction to multivariate statistical analysis. New York: Wiley, 1958.
2. Anderson, T. W., & Rubin, H. Statistical inference in factor analysis. In J. Neyman (Ed.),Proceedings of third Berkeley symposium on mathematical statistics and probability, Berkeley: Univer. California Press, 1956,5, 111–150.
3. Bargmann, R. A study of independence and dependence in multivariate normal analysis. University of North Carolina, Institute of Statistics Mimeo Series No. 186, 1957.
4. Bechtoldt, H. P. An empirical study of the factor analysis stability hypothesis.Psychometrika, 1961,26, 405–432.
5. Bellman, R.Introduction to matrix analysis. New York: McGraw-Hill, 1960.