Storia dei Concili Ecumenici - Ortiz De Urbina, Ignazio. (OLS)http://ftis/name/53160; Camelot, Pierre-Thomas. (OLS)http://ftis/name/53161; Dumeige, Gervais. (OLS)http://ftis/name/53165; Foreville, Raymonde. (OLS)http://ftis/name/53163; Lecler, Joseph. (OLS)http://ftis/name/53164; Stiernon, Daniel. (OLS)http://ftis/name/53162 (Libreria Editrice Vaticana, 1994)