Letter from Magritte to André Bosmans, 19 October 1963
S. Frigerio, Beaux-Arts , Brussels, no. 1069, 26 November 1964, p. 14
Patrick Waldberg, René Magritte , Brussels, 1965, p. 247, illustrated
José Vovelle, Le Surréalisme en Belgique , Brussels, 1972, p. 85, pl. 67, illustrated
Harry Torczyner, Magritte: Ideas and Images , 1977, pp. 261 and 268
René Magritte and André Bosmans; Francine Perceval, ed., Lettres à André Bosmans , 1958-1967 , Paris, 1990, p. 319
Sarah Whitfield and Michael Raeburn; David Sylvester, ed., Rene Magritte: Catalogue Raisonné , vol. III, London, 1993, no. 982, p. 389, illustrated; p. 440
Suzi Gablik, Magritte , London, 1985, no. 27, p. 35, illustrated; p. 200
René-Marie Jongen, René Magritte, ou, La pensée imagée de l"invisible: réflexions et recherches , Brussels, 1994, p. 35, note 27
Henri Laborit, La Légende des comportements , Paris, 1994, pp. 118-19, illustrated in color
Exh. Cat., London, South Bank Centre, Magritte , p. 64, note 2
Patrick Roegiers, Magritte and Photography , New York, 2005, p. 103