Jeanette Beer (1989)
Duel of bestiaries. On "Le Bestiaire d'amour" by Richard de Fournival, and the anonymous response appended to it in several manuscripts
In: Beasts and Birds of the Middle Ages. The Bestiary and its Legacy, ed. by Willene B. Clark / Meradith T. McMunn. University of Pennsylvania Press, Philadelphia, pp. 96-105.