Zur Geschichte des Urchristentums - Blank, Josef. (OLS)http://ftis/name/50931; Müller, Karlheinz. (OLS)http://ftis/name/74606; Merklein, Helmut. (OLS)http://ftis/name/51030; Dautzenberg, Gerhard. (OLS)http://ftis/name/52264 (Herder,, 1979)