W. Spies and S. and G. Metken, Max Ernst, Werke, 1954-1963, Cologne, 1998, p. 397, no. 3808, 2 (another example illustrated). C. Siaud and P. Hugo, Bijoux d'artistes: Hommage à François Hugo, Aix-en-Provence, 2001, p. 117, no. 1554 (another example illustrated).