Frederick Denison Maurice. Moral and Metaphysical Philosophy. New Edition. Macmillan and Co. London. 1872. Volume 2 ("Fourteenth century to the French Revolution with A Glimpse into the Nineteenth Century"). Chapter 1 ("The Fourteenth Century"). Pages 1 to 33.
William J Courtenay. Changing Approaches to Fourteenth-Century Thought. Pontifical Institute of Mediaeval Studies. 2007. (Etienne Gilson series, volume 29). Google Books.
Stephen F Brown, Thomas Dewender and Theo Kobusch (eds). Philosophical Debates at Paris in the Early Fourteenth Century. Brill. Leiden and Boston. 2009. Google Books
^His date of birth is also given as 1246 and 1250.
^Szpiech, Ryan (2006). From Testimonia to Testimony: Thirteenth-Century Anti-Jewish Polemic and the Mostrador de justicia of Abner of Burgos/Alfonso of Valladolid. Dissertation, Yale University. hdl:2027.42/64011.