1. J.-Y.Beziau, D’une caverne à l’autre, MD in Philosophy, supervised by Sarah Kofman, University Paris 1, Panthéon-Sorbonne, 1988.
2. J.-Y.Beziau, “New light on the square of oppositions and its nameless corner”, Logical Investigations, 10, (2003), pp.218-232.
3. J.-Y.Beziau, “The power of the hexagon", Logica Universalis, vol.6 (2012), pp.1-43.
4. J.-Y.Beziau, "An Analogical Hexagon", International Journal of Approximate Reasoning , Volume 94, March 2018, Pages 1–17.
5. J.-Y.Beziau, "The Pyramid of Meaning", in J.Ceuppens, H.Smessaert, J. van Craenenbroeck and G.Vanden Wyngaerd (eds), A Coat of Many Colours - D60, Brussels, 2018.