Augusto Giacometti, Colored Moss, IV, 1919, Gouache on paper mounted on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38558

Johannes Itten, The Eavesdropper (Horchende), 1918, Crayon, charcoal and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33967

Ferdinand Hodler, Head of a Soldier, 1917, Oil on canvas, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/27966

Johannes Itten, Female Nude (Weiblicher Akt), (c. 1917), Charcoal and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37497

Johannes Itten, Untitled (Postcard), 1918, Pencil on postcard, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37586

Diego Rivera, Angeline Beloff, 1917, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33433

Ferdinand Hodler, Profile of  Valentine Godé-Darel, (1914), Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37827

Augusto Giacometti, Color Abstraction II, 1919, Gouache on paper mounted on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38559