Sonia Gechtoff, Violet Window, 1976, Pencil and synthetic polymer paint on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33210

Sonia Gechtoff, Sea Window, II, 1979, Synthetic polymer paint and pencil on colored paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38281