Cicero de Natura Deorum, Libri Tres; (1880) Vol 1
Proceedings of the Society for Medieval Logic & Metaphysics 3
Greek Philosophy, London Study Guide Biblio 2005
Hacker, P Are Secondary Qualities Relative in Mind 95 1986
Lerner Meister Eckhart's Specter - 14th c Bull in Agro Dominico & Inquisitorial Text of 1337