1. Andersen, E.B. (1973). A goodness of fit test for the Rasch model. Psychometrika, 38, 123–140.
2. Baron, J. (1978). Intelligence and general strategies. In G. Underwood (Ed.), Strategies in Information Processing. London: Academic Press.
3. Been, P.H., Jorna, R.J. & Sijtsma, K. (1984). Over kijken, meten en modellen bij breukrekentaken. In P.G. Vos, K.B. Koster Sc J. Kingma (Eds.). Rekenen. Balans van standpunten in theorievorming en empirisch onderzoek. Lisse: Swets & Zeitlinger.
4. Bergan, J.R., Towstopiat, O., Cancelli, A.A. & Karp, C. (1982). Replacement and component rules in hierarchically ordered mathematics rule learning tasks. Journal of Educational Psychology, 74, 32–38.
5. Broadbent, D.E. (1984). The Maltese cross, a new simplistic model for memory. The Behavioral and’ Brain Sciences, 7, 55–95.