Zittel, Claus (Personal Name)
Selbstaufhebungsfiguren bei Nietzsche, 1995: t.p. (Claus Zittel)
Georg Philipp Harsdörffers 'Kunstverständige Discurse', 2010: t.p. (Claus Zittel) p. 338 (academic positions in Florence and Poland; interdisciplinary work in history, philosophy, science and the arts)
National Library of Poland Web OPAC, Mar. 17, 2008 (Zittel, Claus (1965- ))
Kolleg-Forschergruppe Bildakt und Verkörperung, via WWW, July 16, 2014 (Prof. Dr. Claus Zittel; studied German language and literature; teaches at FU Berlin)