G. Grappe, Catalogue du Musée Rodin, Paris, 1927, p. 47, nos. 91-92 (marble version illustrated, p. 47).<br>G. Grappe, Le Musée Rodin, Paris, 1947, p. 142 (marble version illustrated, pl. 71).<br>C. Goldscheider, Rodin, sa vie, son oeuvre, son héritage, Paris, 1962 (marble version illustrated).<br>A.E. Elsen, Rodin, New York, 1963, p. 62 (another cast illustrated, p. 63).<br>R. Descharnes and J.-F. Chabrun, Auguste Rodin, Lausanne, 1967, p. 130 (marble version illustrated, p. 131).<br>I. Jianou and C. Goldscheider, Rodin, Paris, 1967, p. 100 (marble version illustrated, pls. 54-55).<br>C. Goldscheider, Rodin Sculptures, London, 1970, no. 49 (marble version illustrated).<br>J.L. Tancock, The Sculpture of Auguste Rodin, Philadelphia, 1976, pp. 72, 90 and 108, no. 151 (marble version illustrated, p. 77).<br>J. de Caso and P. Sanders, Rodin's Sculpture, A Critical Study of the Spreckels Collection, California Palace of the Legion of Honor, San Francisco, 1977, pp. 148-153, no. 22 (another cast illustrated, p. 150).<br>R.M. Rilke, Rodin, Salt Lake City, 1979, pp. 38 and 104 (another cast illustrated, p. 39).<br>A.E. Elsen, The Gates of Hell by Auguste Rodin, Stanford, California, 1985, p. 78 (another cast illustrated, p. 79).<br>N. Barbier, Marbres de Rodin, Collection du Musée, Paris, 1987, pp. 184-187 and 258, no. 79 (marble version illustrated).<br>A. Le Normand-Romain, Le Baiser de Rodin, Paris, 1995 (another cast illustrated, fig. 3).<br>A. Le Normand-Romain, Rodin, Paris, 1997, p. 49 (terracotta version illustrated, p. 48).<br>J. Vilain, Rodin at the Musée Rodin, Paris, 1999, p. 39 (marble version illustrated).<br>A. Pingeot, "Rodin au Musée du Luxembourg," La Revue du Musée d'Orsay, Autumn 2000, pp. 67-70 and 74, no. 11.<br>R. Butler, "Auguste Rodin," European Sculpture of the Nineteenth Century, The Collections of the National Gallery of Art Systematic Catalogue, 2001, pp. 326-330.<br>A.E. Elsen, Rodin's Art, The Rodin Collection of the Iris & B. Gerald Cantor Center for the Visual Arts at Stanford University, New York, 2003, pp. 214-215 (another cast illustrated, fig. 167).<br>R. Masson and V. Mattiussi, Rodin, Paris, 2004, p. 40 (marble version illustrated, p. 41).<br>A. Le Normand-Romain, The Bronzes of Rodin, Catalogue of Works in the Musée Rodin, Paris, 2007, vol. I, p. 162, no. S. 2393 (another cast illustrated, pp. 158-162; marble version illustrated, p. 163).