1. Agresti, A. (1990). Categorical data analysis. New York: Wiley.
2. Andrich, D. (1978). A rating formulation for ordered response categories. Psychometrika, 43, 561–573.
3. Bleichrodt, N., Drenth, P.J.D., Zaal, J.N., & Resing, W.C.M. (1987). Revisie Amsterdamse kinder intelligentie test. Handleiding (Revision Amsterdam child intelligence test). Lisse, The Netherlands: Swets & Zeitlinger.
4. Cavalini, P.M. (1992). It’s an ill wind that brings no good. Studies on odour annoyance and the dispersion of odorant concentrations from industries. Unpublished doctoral dissertation, University of Groningen, The Netherlands.
5. Chang, H., & Mazzeo, J. (1994). The unique correspondence of the item response function and item category response function in polytomously scored item response models. Psychometrika, 59, 391–404.