Epstein, K. I., & Knerr, C. S.. (1977). Applications of sequential testing procedures to performance testing. 1977 Computerized Adaptive Testing Conference. Minneapolis, MN. USA: University of Minnesota.

Epstein, K. I., & Knerr, C. S.. (1978). Applications of sequential testing procedures to performance testing. In . D. J. Weiss (Ed.), Proceedings of the 1977 Computerized Adaptive Testing Conference. Minneapolis MN: University of Minnesota, Department of Psychology, Psychometric Methods Program.