Courtesy Villa Grisebach, Berlin
Hilti Art Foundation, Schaan, Liechtenstein
Ahlen, Kaldewei Kulturstiftung / Courtesy Galerie Kornfeld, Bern
Kunsthalle Mannheim, Foto: Cem Yücetas
Courtesy Galerie Thomas, München
akg-images 583036
Saint Louis Art Museum, Bequest of Morton D. May 862:1983
Saint Louis Art Museum, Bequest of Morton D. May 867:1983