File:Marc Chagall, 1913, Paris par la fenêtre (Paris Through the Window), oil on canvas, 136 x 141.9 cm, Solomon R. Guggenheim Museum, New York.jpg

Published 1922
[http://libmma.contentdm.oclc.org/cdm/compoundobject/collection/p16028coll4/id/18188/rec/4 Lafora, Gonzalo R. (Gonzalo Rodríguez), Estudio psicológico del cubismo y expresionismo, Archivos de neurobiología. v. 22, no. 2 (1922 June), published by Ruiz Hermanos, Madrid]. Digital Collection, Rare Books in The Metropolitan Museum of Art Libraries, Thomas J. Watson Library