Picasso, Pablo, Cruche en forme de canard, Museum Ludwig, Köln, Inv.-Nr. ML 01671
Sharits, Paul, Ray Gun Virus, Museum Ludwig, Köln, Inv.-Nr. ML/F 1986/0238
Viola, Bill, The Greeting, Museum Ludwig, Köln, Inv.-Nr. ML 01619
McCaslin, Matthew, Split Level Mind Revisited, Museum Ludwig, Köln, Inv.-Nr. ML 01641