Sophie Taeuber (Davos 1889 –1943 Zurich), Rythmes libres, 1919
Watercolour and gouache over pencil, vellum mounted on cardstock paper, 37.6 × 27.5 cm, Kunsthaus Zürich, Prints and Drawings, Z.Inv. 1958/6
Source : http://www.kunsthaus.ch/dadadig/fr/dada-sur-papier#!artwork/sophie-taeuber-rythmes-libres