René Magritte, Perspective, (1963), Crayon on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36809

René Magritte, The Thought Which Sees, 1965, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35714

Jan Lebenstein, Axial Figure, 1961, Felt-tip pen on paper on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33172

Pierre Alechinsky, Outside James' Showcase, 1968, Ink on mulberry paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/32969

Zbigniew Makowski, [Untitled], 1964, Watercolor and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38583

Zbigniew Makowski, [Untitled], 1964, Watercolor and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37655

Zbigniew Makowski, [Untitled], 1965, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38584

Jan Lebenstein, Figure, 1962, Gouache, watercolor, and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37823

Pierre Alechinsky, Vanished in Smoke, 1962, Distemper, ink, gouache and watercolor on paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33616

Andrzej J. Wroblewski, Instrument #3, 1962, Colored ink and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37075

Pierre Alechinsky, One Day, the Night, 1960, Ink on transparentized paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37867

Jan Lebenstein, Axial Figure, 1960, Watercolor, ink, and ballpoint pen on graph paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37821

Pierre Alechinsky, The Complex of the Sphinx, 1967, Synthetic polymer paint, oil, and ink on Japanese paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37446

Jan Lebenstein, Axial Figure, 1960, Felt-tip pen on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36323