R.M. Rilke, Auguste Rodin, Leipzig, 1913 (other versions illustrated, pls. 43-44).
G. Grappe, Catalogue du Musée Rodin, Paris, 1929, pp. 73-74 (other casts and versions illustrated).
H. Martinie, Auguste Rodin, Paris, 1949, no. 19 (another cast illustrated).
C. Goldscheider, Rodin, Paris, 1962, p. 65 (another version illustrated).
A.E. Elsen, Rodin, New York, 1963, pp. 52-53, 55 and 57 (larger version illustrated, pp. 52 and 54).
B. Champigneulle, Rodin, London, 1967, pp. 130, 133 and 281 (larger version illustrated, p. 131, fig. 53; larger version illustrated again, p. 132, fig. 55).
R. Descharnes and J.-F. Chabrun, Auguste Rodin, Lausanne, 1967, p. 75 (another cast illustrated, p. 74).
I. Jianou and L. Goldscheider, Rodin, Paris, 1967, p. 88 (another cast illustrated, pl. 11).
L. Goldscheider, Rodin: Sculptures, London, 1970, pp. 8 and 117 (plaster version illustrated, pl. 14; larger cast illustrated, pls. 15-16).
J.L. Tancock, The Sculpture of Auguste Rodin: The Collection of the Rodin Museum, Philadelphia, 1976, pp. 111-112, 114 and 116-120, no. 3a (another cast illustrated, p. 113; larger version illustrated, p. 115).
A.E. Elsen, ed., Rodin: Rediscovered, Washington, D.C., 1981, p. 333, no. 261 (clay version illustrated, p. 67, figs. 3.11-3.12).
C. Vincent, "Rodin at the Metropolitan Museum of Art: A History of the Collection" in The Metropolitan Museum of Art Bulletin, vol. 38, no. 4, Spring 1981, pp. 4-5, 7 and 11 (another cast illustrated, p. 6, fig. 3).
P. Gsell, Rodin on Art and Artists, New York, 1983, pp. 10 and 82 (another version illustrated, p. 12).
A.E. Elsen, The Gates of Hell by Auguste Rodin, Stanford, 1985, pp. 57-58 and 72 (clay version illustrated, figs. 50, 52 and 60).
R. Grunfeld, Rodin: A Biography, New York, 1987, pp. 187, 192, 366, 425, 431, 445, 460, 466, 468, 502, 503-505, 550 and 557.
P.J. Marandel, "Rodin's 'Thinker': Notes on the Early History of the Detroit Cast" in Bulletin of the Detroit Institute of Arts, vol. 63, no. 3/4, 1988, pp. 33 and 42 (another version illustrated, p. 32).
R. Butler, Rodin: The Shape of Genius, New Haven, 1993, pp. 158, 219, 388, 340, 355, 361, 377, 388, 404, 408, 413, 414, 417, 422-427, 429-433, 448-449, 452, 465 and 515 (larger version illustrated, pp. 157, 383 and 428, figs. 63, 155 and 177).
F. Fergonzi, M.M. Lamberti and C. Riopelle, Michelangelo nell’Ottocento: Rodin e Michelangelo, Florence, 1996, p. 80, no. 15 (another cast illustrated, pp. 42, 81 and 124).
R. Butler and S.G. Lindsay, The Collections of the National Gallery of Art Systematic Catalogue: European Sculpture of the Nineteenth Century, New York, 2000, pp. 321-325 and 376 (another cast illustrated, pp. 323-324; larger version illustrated, p. 325).
I. Ross and A. Snow, Rodin: A Magnificent Obsession, New York, 2001, pp. 96 and 175 (another cast illustrated on a frontispiece; other casts and versions illustrated, p. 97, pl. 73).
A. Le Normand Romain, Rodin: The Gates of Hell, Paris, 2002, pp. 66 and 68-69 (other casts and versions illustrated, pp. 67-69).
A.E. Elsen, Rodin’s Art: The Rodin Collection of the Iris and B. Gerald Cantor Center for Visual Arts at Stanford University, New York, 2003, pp. 161, 169, 170 and 174-175, no. 38 (other casts and versions illustrated, pp. 174-179, figs. 131-134 and 136).
R. Masson and V. Mattiussi, Rodin, Paris, 2004, pp. 38 and 40 (larger version illustrated, pp. 38-39).
R.M. Rilke, Auguste Rodin: Illustrated, New York, 2006 (reprint), p. 77 (larger version illustrated).
A. Le Normand-Romain, The Bronzes of Rodin: Catalogue of Works in the Musée Rodin, Paris, 2007, vol. II, pp. 584-595 (other casts and versions illustrated).
A. Le Normand-Romain, Rodin, New York, 2014, pp. 1, 42, 80, 90, 91-92, 95, 105, 118, 178, 339-340, 344, 389 and 390 (other casts and versions illustrated).