Prestwood, J. S., Vale, C. D., Massey, R. H., & Welsh, J. R.. (1985). Armed Services Vocational Aptitude Battery: Development of an adaptive item pool (AFHLR-TR-85-19; Technical Rep No 85-19). Brooks Air Force Base TX: Air Force Human Resources Laboratory.

Vale, C. D. (1977). Adaptive testing and the problem of classification. In . D. Weiss (Ed.), Applications of computerized adaptive testing (Research Report 77-1). Minneapolis MN: University of Minnesota, Department of Psychology, Psychometric Methods Program.

Weiss, D. J., & Vale, C. D.. (1987). Adaptive testing. Applied Psychology: An International Review, 36, 249-262.