Proceedings of the Third International Congress of Medieval Canon Law : Strasbourg, 3-6 September 1968 / edited by Stephan Kuttner. - International Congress of Medieval Canon Law (3rd : 1968 : Strasburgo). (OLS)http://pul/name/79661; Kuttner, Stephan, 1907-1996. (OLS)http://pul/name/4845 (Biblioteca Apostolica Vaticana, 1971)