1. ANDERSON, T. W. Introduction to multivariate statistical analysis. New York: Wiley, 1958.
2. ANDERSON, T. W. and RUBIN, H. Statistical inference in factor analysis. In Proc. of the Third Berkeley Symp. of Math. Statist. and Probability. Vol. 5, Berkeley: Univer. of California Press, 1956, Pp. 111–150.
3. BARGMANN, R. Signifikanzuntersuchungen der einfachen struktur in der faktoren-analyse. Sonderdruck, Mitteilungsbl. f. Math. Stat., Physica-Verlag, Würzburg, 1954.
4. BARGMANN, R. A study of independence and dependence in multivariate normal analysis. Univer. North Carolina, Inst. Statist. Mimeo. Ser. No. 186, 1957.
5. BECHTOLDT, H. P. Statistical tests of hypotheses in confirmatory factor analysis. Amer. Psychologist, 1958, 13, 380 (abstract).