George Grappe, Catalogue du Musée Rodin, Paris, 1929, nos. 167-69, illustrations of another cast pp. 73-74 ↵George Grappe, Catalogue du Musée Rodin, Paris, 1944, illustration of the plaster p. 40↵Henri Martinie, Auguste Rodin, Paris, 1949, no. 19, illustration of another cast↵Albert E. Elsen, Rodin, New York, 1963, illustrations of other casts pp. 25, 52 & 53↵Ionel Jianou & Cécile Goldscheider, Rodin, Paris, 1967, edition catalogued p. 88 & illustration of another cast pl. 11↵John L. Tancock, The Sculpture of Auguste Rodin, Philadelphia, 1976, edition catalogued & illustrations of other casts pp. 111-20↵Albert E. Elsen, ed., Rodin Rediscovered, Washington, D.C., 1981, illustration of the clay model p. 67↵Albert E. Elsen, The Gates of Hell by Auguste Rodin, Stanford, 1985, illustrations of the clay model pp. 56 & 71↵Hélène Pinet, Rodin Sculpteur et les photographes de son temps, Paris, 1985, illustrations of other casts pp. 80-83↵Antoinette Le Normand-Romain, The Bronzes of Rodin, Catalogue of Works in the Musée Rodin, Paris, 2007, vol. II, illustrations of other casts pp. 584-94