Aleksander Kobzdej, Conflict, 1959, Casein and oil on paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33730

Anna Ticho, Landscape behind Rocks, (1951), Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37116

Eduardo Ramírez Villamizar, Black and White, 1956, Gouache and pencil on colored paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37408