Logos Islamikos : studia islamica in honorem Georgii Michaelis Wickens / edited by Roger M. Savory and Dionisius A. Agius. - Savory, Roger. (OLS)http://pul/name/111733; Agius, Dionisius A. (OLS)http://pul/name/111734 (Pontifical Institute of Mediaeval Studies, 1984)