Paul Delvaux, Composition (The Siesta), 1947, Ink and watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36694

Georges Vantongerloo, 10 Origin, 1942, Portfolio of six linoleum cuts, three woodcuts, and one lithograph, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/19632

Georges Vantongerloo, Plate (folio 22) from 10 Origin, 1942, Linoleum cut from a portfolio of six linoleum cuts, three woodcuts, and one lithograph, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/19633