Passos, V. L., Berger, M. P. F., & Tan, F. E. S.. (2008). The D-optimality item selection criterion in the early stage of CAT: A study with the graded response model. Journal of Educational and Behavioral Statistics, 33, 88-110.

Berger, M. P. F. (1994). A general approach to algorithmic design of fixed-form tests, adaptive tests, and testlets. Applied Psychological Measurement, 18, 141-153.

Berger, M. P. F. (1994). A General Approach to Algorithmic Design of Fixed-Form Tests, Adaptive Tests, and Testlets. Applied Psychological Measurement, 18(2), 141-153.

Veerkamp, W. J. J.,, & Berger, M. P. F.. (1997). Some new item selection criteria for adaptive testing. Journal of Educational and Behavioral Statistics, 22, 203-226.

Veerkamp, W. J., & Berger, M. P. F.. (1994). Some new item selection criteria for adaptive testing (Research Rep 94-6). Enschede, The Netherlands: University of Twente, Department of Educational Measurement and Data Analysis.

Passos, V. L., Berger, M. P. F., & Tan, F. E.. (2007). Test design optimization in CAT early stage with the nominal response model. Applied Psychological Measurement, 31, 213-232.