1. Bechtoldt, H. P. An empirical study of the factor analysis stability hypothesis.Psychometrika, 1961,26, 405–432.
2. Browne, M. A. Comparison of factor analytic techniques. Unpublished M.A. Thesis, University of the Witwatersrand, Union of South Africa, 1965.
3. Cliff, N. Orthogonal rotation to congruence.Psychometrika, 1966,31, 33–42.
4. Cliff, N. and Hamburger, C. The study of sampling errors in factor analysis by means of artificial experiments. Mimeographed report, University of Southern California, 1966.
5. Dwyer, P. S. The square root method and its use in correlation and regression.Journal of American Statistical Association, 1945,40, 493–503.