G. Grappe, Catalogue du Musée Rodin, Paris, 1927, nos. 91-92 ( the marble version illustrated p. 47).G. Grappe, Le Musée Rodin, Paris, 1947, p. 142 (the marble version illustrated pl. 71).C. Goldscheider, Rodin: sa vie, son oeuvre, son héritage, Paris, 1962 (the marble version illustrated).A.E. Elsen, Rodin, New York, 1963, pp. 62 & 63 (another cast illustrated p. 63).I. Jianou & C. Goldscheider, Rodin, Paris, 1967, p. 100 (the marble version illustrated pls. 54 & 55).R. Descharnes & J.-F. Chabrun, Auguste Rodin, London, 1967, p. 130 (the marble version illustrated p. 131).C. Goldscheider, Rodin Sculptures, London, 1970, no. 49 (the marble version illustrated).J.L. Tancock, The Sculpture of Auguste Rodin, Philadelphia, 1976, pp. 72, 90 & 108 (the marble version illustrated p. 77).R.M. Rilke, Rodin, Salt Lake City, 1979, pp. 38 & 104 (another cast illustrated p. 39).A.E. Elsen, The Gates of Hell by Auguste Rodin, Stanford, California, 1985, p. 78 (another cast illustrated p. 79).A. Le Normand-Romain, Le Baiser de Rodin, Paris, 1995 (another cast illustrated).J. Vilain, Rodin at the Musée Rodin, Paris, 1999, p. 39 (the marble version illustrated).R. Masson & V. Mattiussi, Rodin, Paris, 2004, p. 40 (the marble version illustrated p. 41).A. Le Normand-Romain, The Bronzes of Rodin, Catalogue of Works in the Museé Rodin, vol. I, Paris, 2007, p. 161 (another cast illustrated).