Aleksanda wa Hales
Boehner, Philotheus. The History of the Franciscan School,  I. Alexander of Hales;  II. John of Rupella – Saint Bonaventure;  III. Duns Scotus; Pt. IV. William Ockham, St. Bonaventure, N.Y. : St. Bonaventure University, 1943-1946.