Yohane Duns Scotus
John Duns Scotus, Contingency and Freedom. Lectura I 39, transl., comment. and intro. by A. Vos Jaczn, H. Veldhuis, A.H. Looman-Graaskamp, E. Dekker and N.W. den Bok. The New Synthese Historical Library 4. Dordrecht/Boston/London: Kluwer, 1994.