File:Marcel Duchamp, 1912, Le Roi et la Reine entourés de Nus vites (The King and Queen Surrounded by Swift Nudes), oil on canvas, 114.6 x 128.9 cm, Philadelphia Museum of Art.jpg

Published 1913, 1922

 * Guillaume Apollinaire, Les Peintres cubistes, Méditations Esthétiques, Eugène Figuière et Cie, Éditeurs, 1913


 * 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