Helene Schjerfbeck, Mädchen mit blondem Haar, 1916, Öl auf Leinwand, Städel Museum, Frankfurt am Main. https://dartabase.art/cite/staedel/114101

Camilo Blas (José Alfonso Sánchez Urteaga), Threshing ( La Trilla ), 1928, Oil on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37703

Rafael Hastings, WHO? VII, (1968), Gouache, pencil, and felt-tip pen on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38696