1. Adachi, K. (2013). Factor analysis with EM algorithm never gives improper solutions when sample covariance and initial parameter matrices are proper. Psychometrika, 78, 380–394.
2. Anderson, T. W. (1984). An introduction to multivariate statistical analysis. New York: Wiley.
3. Anderson, T. W., & Rubin, H. (1956). Statistical inference in factor analysis. In Proceedings of the Third Berkeley Symposium on Mathematical Statistics and Probability, 1954–1955, vol. V (pp. 111–150). Berkeley and Los Angeles: University of California Press.
4. Bai, J., & Li, K. (2012). Statistical analysis of factor models of high dimension. Annals of Statistics, 40, 436–465.
5. Cramer, E. (2000). Probability measures with given marginals and conditionals: I-projections and conditional iterative proportional fitting. Statistics and Decisions, 18, 311–329.