Opera omnia - Benedictus 16., papa. (OLS)http://ftis/name/51341; Müller, Gerhard Ludwig. (OLS)http://ftis/name/55544; Caruana, Edmondo. (OLS)http://ftis/name/56030; Azzaro, Pierluca. (OLS)http://ftis/name/56031; Stampa, Ingrid. (OLS)http://ftis/name/56032 (Libreria Editrice Vaticana, 2010)