1. The Process of Student Cognition in Constructing Mathematical Conjecture
2. Blanton, M. L. & Kaput, J. J. (2004). Elementary grade students' capacity for functional thinking. In M. J. Høines & A. B. Fuglestad (Eds.), Proceedings of the 28th Conference of the International Group for the Psychology of Mathematics Education (2, pp. 135-142). Bergen, NO: PME.
3. Boero, P. (2017). Cognitive unity of theorems, theories and related rationalities. Proceedings of CERME. 10, 99-106. hal-01873224.
4. Carpenter, T. P., Franke, M. L. & Levi, L. (2003). Thinking mathematically: Integrating arithmetic and algebra in elementary school. Heinemann.
5. Ellis, A. B. (2007). Connections between generalizing and justifying: Students' reasoning with linear relationships. Journal for Research in Mathematics Education. 38(3), 194-229.