Cliff, N. (1966). Orthogonal rotation to congruence. Psychometrika, 31, 33-42.
3.
Jöreskog, K.G. (1971). Simultaneous factor analysis in several populations . Psychometrika, 36, 409-426.
4.
Kaiser, H.F., Hunka, S., & Bianchini, J. (1971). Relating factors between studies based upon different individuals. Multivariate Behavioral Research, 6, 409-422.
5.
Schönemann, P.H. (1966). A generalized solution of the orthogonal Procrustes problem. Psychometrika, 31, 1-10.
6.
Tucker, L.R. (1951). A method for synthesis of factor analysis studies (Personnel Research Section Report No. 984). Washington DC: Department of the Army.