1. Ackerman, T.A. (1992). A didactic explanation of item bias, item impact, and item validity from a multidimensional perspective. Journal of Educational Measurement, 29, 67–91.
2. Ahmavaara, Y. (1954). The mathematical theory of factorial invariance under selection. Psychometrika, 19, 27–38.
3. American Educational Research Association, American Psychological Association, & National Council on Measurement in Education Joint Committee on Standards for Educational and Psychological Testing (1999). Standards for educational and psychological testing. Washington: AERA.
4. Birnbaum, M.H. (1979). Procedures for the detection and correction of salary inequities. In T.R. Pezzullo & B.E. Brittingham (Eds.), Salary equity (pp. 121–44). Lexington: Lexington Books.
5. Bloxom, B. (1972). Alternative approaches to factorial invariance. Psychometrika, 37, 425–440.