1. Anghileri, J., Beishuizen, M., & van Putten, K. (2002). From informal strategies to structured procedures: Mind the gap!. Educational Studies in Mathematics, 49(2), 149–170.
2. Anon. (2004). Problem solving for tomorrow’s world. First measures of cross-curricular competencies from PISA 2003. OECD. Available in: http://www.pisa.oecd.org/pages/0,2966,en_32252351_32236359_1_1_1_1_1,00.html .
3. Campbell, S. (1996). On preservice teachers’ understandings of division with remainder. In L. Puig & A. Gutierrez (Eds.), Proceedings of the 28th conference of the International Group for the Psychology of Mathematics Education, vol. 2 (pp. 177–184). Valencia: Universitat de Valencia.
4. Fischbein, E., Deri, M., Nello, M., & Marino, M. (1985). The role of implicit models in solving verbal problems in multiplication and division. Journal for Research in Mathematics Education, 16(1), 3–17.
5. Graeber, A., Tirosh, T., & Glover, R. (1989). Preservice teachers’ misconceptions in solving verbal problems in multiplication and division. Journal for Research in Mathematics Education, 20(1), 95–102.