Guttman, Louis. "Some Necessary Conditions for Commonfactor Analysis." Psychometrika, XIX (1954), 149-161.
2.
Kaiser, Henry F. "The Varimax Criterion for Analytic Rotation in Factor Analysis." Psychometrika, XXIII (1958), 187-200.
3.
Kaiser, Henry F. "The Application of Electronic Computers to Factor Analysis." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XX (1960), 141-151. (a)
4.
Kaiser, Henry F. "Comments on Communalities and the Number of Factors." A paper read at an informal conference at Washington University, St. Louis , May 14,1960. (b)
5.
Smith, Eugene R. et al, Progressive Education Association, Commission on the Relation of School and College, Appraising and Recording Student Progress. New York: Harper and Brothers, 1942. p. 18.