Sylvia Plimack Mangold, Study for Floor with Horizontal Mirror, 1973, Synthetic polymer paint, ink, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38554

Sylvia Plimack Mangold, Study for Two Exact Rules on a Diminishing Floor Plane, 1976, Synthetic polymer paint, ink, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38302