1. Arzarello, F., Bartolini Bussi, M. G., Leung, A., Mariotti, M. A., & Stevenson, I. (2012). Experimental approach to theoretical thinking. In G. Hanna & M. de Villers (Eds.), Proof and proving in mathematics education (pp. 97–137). New York: Springer.
2. Balacheff, N. (2013). cK¢, a model to reason on learners’ conceptions. In M. V. Martinez & A. C. Superfine (Eds.), Proceedings of PME-NA 35 (pp. 2–15). IL, United States: Chicago.
3. Barany, M., & MacKenzie, D. (2014). Chalk: Materials and concepts in mathematics research. In C. Coopmans, J. Vertesi, M. Lynch, & S. Woolgar (Eds.), Representation in scientific practice revisited (pp. 107–130). Cambridge, MA: MIT Press.
4. Bartolini Bussi, M. G., & Baccaglini-Frank, A. (2015). Geometry in early years: Sowing the seeds towards a mathematical definition of squares and rectangles. ZDM: International Journal on Mathematics Education, 47(3), 391–405.
5. Bartolini Bussi, M. G., & Mariotti, M. A. (2008). Semiotic mediation in the mathematics classroom: Artefacts and signs after a Vygotskian perspective. In L. English et al. (Eds.), Handbook of international research in mathematics education (pp. 720–749). Mahwah, NJ: Erlbaum.