Constantin Brancusi, Studio drawing, n.d., Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37815

Constantin Brancusi, Studio drawing, n.d., Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37813

Marc Chagall, Standing Nude, (1904), Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36854

Constantin Brancusi, Study related to The First Step, 1913, Crayon on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/32964

Marc Chagall, Study for Birthday, 1915, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36449