Agnes Denes, Isometric Systems in Isotropic Space. Map Projection: Snail, 1974, Printed plastic sheet overlaid on graph paper with charcoal, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36481

Agnes Denes, Systems of Logic/Logic of Systems, 1976, Ink and metallic ink on synthetic polymer sheet, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33959