1. Bergqvist, T., Lithner, J., & Sumpter, L. (2003). Reasoning characteristics in upper secondary school students’ task solving. Department of Mathematics and Mathematical Statistics, Umeå University, Research Reports in Mathematics Education (1).
2. Boesen, J., Lithner, J., & Palm, T. (2005). The relation between test task requirements and the reasoning used by students. Department of Mathematics and Mathematical Statistics, Umeå University, Research Reports in Mathematics Education (4).
3. The powers and pitfalls of algorithmic knowledge: a case study;Brayer Ebby;The Journal of Mathematical Behavior,2005
4. Teacher-made tests: Windows on the classroom;Flemming,1983
5. Recognising mathematical creativity in schoolchildren;Haylock;Zentralblatt fuer Didaktik der Mathematik,1997