Gustave Geffroy, "Salon de 1886: VIII, Hors du Salon: Les Impressionnistes," La Justice, Paris, May 1886, mentioned pp. 1-2. Octave Mirbeau, "Exposition de peinture (I, rue Laffitte)," La France, Paris, May 1886, mentioned pp. 1-2. Felix Fénéon, "Les Vingtistes parisiens," La Vogue, Paris, June 1886, mentioned pp. 261-275. Octave Maus, "Les Vingtistes parisiens," L'Art modern, Brussels, June 1886, mentioned pp. 201-204. Paul Lafond, Degas, vol. II, Paris, 1918-19, listed p. 17. Paul-André Lemoisne, Degas et son oeuvre, vol. III, Paris, 1946, no. 831, illustrated p. 481. Jean Sutherland Boggs, Portraits by Degas, Berkeley & Los Angeles, 1962, no. 134, listed p. xi; illustrated pl. 134. . Franco Russoli & Fiorella Minervino, L'Opera completa di Degas, Milan, 1970, no. 642, illustrated p. 116. Paul-André Lemoisne, Degas et son oeuvre, vol. III, New York & London, 1984, no. 831, illustrated p. 481. Jean Sutherland Boggs & Anne Maheux, Degas Pastels, New York, 1992, no. 33, illustrated p. 105. Ruth Berson, The New Painting, Impressionism 1874-1886, vol. I, San Francisco, 1996, listed p. 422; vol. II, catalogued p. 240; illustrated p. 258