Nicolai de Cusa Dialogus de ludo globi / edidit commentariisque illustravit Iohannes Gerhardus Senger. - Cusanus, Nicolaus, card., 1401-1464. (OLS)http://pul/name/725; Senger, Hans Gerhard. (OLS)http://pul/name/13471 (in aedibus Felicis Meiner, 1998)