The setting of Second Clement in early Christianity - Donfried, Karl Paul. (OLS)http://ftis/name/59884 (Brill,, 1974)

Die Frage nach Gott - Biser, Eugen. (OLS)http://ftis/name/57014; Benedictus 16., papa. (OLS)http://ftis/name/51341 (Herder,, 1973)