- Nicholas, of Cusa, Cardinal, 1401-1464 (13)
- Senger, Hans Gerhard (4)
- Wilpert, Paul, 1906-1967 (4)
- Klibansky, Raymond, 1905- (3)
- Bormann, Karl, 1928- (2)
- Happ, Winfried, 1954- (2)
- Hoffmann, Ernst (2)
- Koch, Josef (2)
- Decker, Bruno (1)
- Steiger, Renate (1)