G. Waldemar, 'La Collection Viau. I - La peinture moderne', in L'Amour de l'art , no. 1, January 1925, pp. 362 & 368 (illustrated p. 368).
G. Waldemar, 'Masks or Faces', in Apollo: A Journal of the Arts , vol. XIII, no. 77, May 1931, p. 274 (illustrated; titled 'Léon Bonnat').
P.A. Lemoisne, Degas et son œuvre , vol. II, Paris, 1946, no. 150, p. 76 (illustrated p. 77; dated ' circa 1866-1870').
F. Russoli & F. Minervino, L'opera completa di Degas , Milan, 1970, no. 236, p. 96 (illustrated p. 97, dated '1865-1870').
J. Lassaigne & F. Minervino, Toute l'œuvre peinte de Degas , Paris, 1974, no. 236, p. 96 (illustrated p. 97; dated '1865-1870').
Exh. cat., Villa Medici, Degas e l'Italia , Rome, 1984, p. 32 (illustrated fig. 16).
H. Loyrette, Degas , Paris, 1991, p. 119.
C. Ives, S.A. Stein & J.A. Steiner (eds), The Private Collection of Edgar Degas, A Summary Catalogue , New York, 1997, p. 124.