Bibliographia de vita, operibus et doctrina Iohannis Duns Scoti, doctoris subtilis ac Mariani, saec. XIX-XX / collegit p. Odulfus Schäfer. - Schäfer, Odulf. (OLS)http://pul/name/14755 (Orbis Catholicus, 1955)
Testo su due colonne.