Francis Picabia: Illustration for:
Tristan Tzara: 7 Manifestes Dada, 1924

Oswald Oberhuber:
Große Rechnung, 1953

Mario Merz: Untitled, 1975
[Fibonacci Series]

Mel Bochner: Counting Alternatives:
Zero Center, 1972

Mel Bochner, 1994

Ray Johnson: Untitled, 1988