Bach, C. C. (2021).
Mathematical communication competency in a setting with GeoGebra. In Y. Liljekvist, L. B. Boistrup, J. Häggström, L. Mattsson, O. Olande & H. Palmér (Eds.),
Sustainable mathematics education in a digitalized world: Proceedings of MADIF 12 The twelfth research seminar of the Swedish Society for Research in Mathematics Education Växjö, January 14–15, 2020 (pp. 121-130). Svensk Förening för Matematikdidaktisk Forskning.