A.R. Penck (Ralf Winkler), [Untitled], 1967, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36999

A.R. Penck (Ralf Winkler), [Untitled], 1967, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36996

A.R. Penck (Ralf Winkler), [Untitled], 1967, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36997

A.R. Penck (Ralf Winkler), [Untitled], 1967, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36998

A.R. Penck (Ralf Winkler), [Untitled], 1967, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36992

A.R. Penck (Ralf Winkler), [Untitled], 1967, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36994

A.R. Penck (Ralf Winkler), [Untitled], 1967, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36995

A.R. Penck (Ralf Winkler), [Untitled], 1975, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36288

A.R. Penck (Ralf Winkler), Untitled (Standart), 1980, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35655

A.R. Penck (Ralf Winkler), [Untitled], c. 1980–81, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35366