パウル・クレー
Berggruen, Olivier (2011). “Paul Klee – In Search of Natural Signs”. The Writing of Art. London: Pushkin Press. ISBN 978-1906548629
Franciscono, Marcel (1991). Paul Klee: His Work and Thought. University of Chicago Press, 406 pages, ISBN 0-226-25990-0.
Hausenstein, Wilhelm (1921). Kairuan oder eine Geschichte vom Maler Klee und von der Kunst dieses Zeitalters ('Kairuan or a History of the Artist Klee and the Art of this Age')
Kort, Pamela (2004). Comic Grotesque: Wit and Mockery in German Art, 1870–1940. Prestel.