1. The functions of multiple representations;Ainsworth;Computers and Education,1999
2. Cognitive styles: some information and implications for instructional design;Ausburn;Educational Communication and Technology,1978
3. Wissensvermittlung: Die Gestaltung von Lernmaterial;Ballstaedt,1997
4. Statistical models,1992
5. Clement, J. (1985). Misconceptions in graphing. In: Proceedings of the 9th conference of the international group for the psychology of mathematics education. (Vol. 1), pp. 369–375.