Promoting a practice of active student-centred instruction into the mathematics classroom: matematita's "turnkey laboratory" kits
Proofs of certain properties of irrational roots
Pseudospheres in geometry and physics: from Beltrami to De Sitter and beyond
Publication history of von Staudt's Geometrie der Lage
Publier sous l'Occupation I. Autour du cas de Jacques Feldbau et de l'Académie des sciences
Pythagorean Triples and a New Pythagorean Theorem