1. Artigue, M., Bartolini-Bussi, M., Dreyfus, T., Gray, E., & Prediger, S. (2006). Different theoretical perspectives and approaches in research in mathematics education. In M. Bosch (Ed.), Proceedings of the 4th congress of the European society for research in mathematics education, Sant Feliu de Guíxols, Spain: Fundemi IQS, pp. 1239–1244.
2. Arzarello, F., Bosch, M. Lenfant, A., & Prediger, S. (2007). Different theoretical perspectives in research from teaching problems to research problems. In D. Pitta-Pantazi & G. Philippou (Eds.), Proceedings of the 5th congress of the European society for research in mathematics education (CERME 5), Cyprus 2007, ERME, pp. 1618–1627.
3. Arzarello, F., Bosch, M., Gascón, J., & Sabena, C. (2008). The ostensive dimension through the lenses of two didactic approaches. ZDM—The International Journal on Mathematics Education (this issue).
4. Bakhtin, M. M. (1986). Speech genres and other late essays. Austin: University of Texas Press.
5. Bergsten C. (2008). On the influence of theory on research in mathematics education: the case of teaching and learning limits of functions. ZDM—The International Journal on Mathematics Education (this issue).