1. Andersen, E.B. (1980). Discrete Statistical Models with Social Science Applications. Amsterdam: North Holland
2. Andrich, D. (1985). A latent trait model with response dependencies: impli-cations for test construction and analysis. In S.E. Embretson (Ed.), Test Design: Developments in Psychology and Psychometrics (pp. 245–275). Orlando, FL: Academic Press.
3. Bickel, P. and Doksum, K. (1977). Mathematical Statistics: Basic Ideas and Selected Topics. San Francisco: Holden-Day.
4. Embretson, S. (1984). A general latent trait model for item responses. Psychometrika
49, 211–218.
5. Gibbons, R.D., Bock, R.D., and Hedeker, D.R. (1989). Conditional Dependence (Office of Naval Research Final Report No. 89–1). Chicago: University of Chicago.