Lucio Fontana, Spatial Concept (Concetto spaziale), 1957, Ink and pencil on paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37812

Lucio Fontana, [Untitled], 1956, Ink on incised paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37632

Alberto Magnelli, Opposition from Art of Today, Masters of Abstract Art (Art d'aujourd'hui, maîtres de l'art abstrait), Album I, 1953 (original executed in 1942), One from a portfolio of sixteen screenprint reproductions, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/31862