1. Anderson, T. W., & Rubin, H. Statistical inference in factor analysis.Proceedings of the Third Berkeley Symposium on Mathematical Statistics and Probability, Univ. of Califfornia Press, 1956,5, 111–149.
2. Fletcher, R., & Powell, M. J. D. A rapidly convergent descent method for minimization.Computer Journal, 1963,6, 163–168.
3. Harman, H. H.Modern factor analysis. Univ. of Chicago Press, 1960.
4. Henrici, P.Elements of numerical analysis. Wiley, New York, 1964.
5. Jennrich, R. I., & Sampson, P. F. Application of stepwise regression to non-linear estimation.Technometrics, 1968,10, 63–72.