František Kupka, Composition géométrique (Geometric composition), c.1909–11, Gouache on paper, Queensland Art Gallery and Gallery of Modern Art, Brisbane. https://dartabase.art/cite/qagoma/65734

Alexis Arapoff, COUPLES MONDAINS, 2e quart 20e siècle, gouache; encre noire; plume; crayon noir; papier (beige), Cabinet des estampes et des dessins, Strasbourg. https://dartabase.art/cite/joconde/00000065698