Horacker - Raabe, Wilhelm <1831-1910>. (OLS)http://semarc/name/64104; Thiele, H. (OLS)http://semarc/name/64645; Kaeseberg, H. (OLS)http://semarc/name/64644; Grot-Johann, Philipp. (OLS)http://semarc/name/64643 (Grote'sche Verlagsbuchhandlung, 1902)

Le idee sull'arte - Buonarroti, Michelangelo, <1475-1564>. (OLS)http://semarc/name/5320; Battisti, Eugenio <1924-1989>. (OLS)http://semarc/name/89766; Clements, Robert J. (OLS)http://semarc/name/6703 (Michelangelo)
Fondo Ciprandi.