R. Biehler and V. Durand-Guerrier, “University Mathematics Didactic Research on Number Theory, Algebra, Discrete Mathematics, Logic,” in Proceedings of the Third Conference of the International Network for Didactic Research in University Mathematics (INDRUM 2020, 12-19 September 2020), T. Hausberger, M. Bosch, and F. Chelloughi, Eds. Bizerte, Tunisia: University of Carthage and INDRUM, 2020.