Die Gnadenlehre des Petrus Lombardus - Schupp, Johann. (OLS)http://semarc/name/33359 (Herder & Co.,, 1932)
Keywords: Pietro : Lombardo <vescovo; m. 1160>. (OLS)http://semarc/subject/7506; Grazia divina - Teologia. (OLS)http://semarc/subject/318