(Summa de confessione) Compilatio praesens - Pietro : di Poitiers. (OLS)http://ftis/name/73160; Costello, Hilary. (OLS)http://ftis/name/53473; Mikkers, Edmundus. (OLS)http://ftis/name/73134 (Typographi Brepols editores pontificii,, 1980)