Charles DE GROUX, peintre, in: J.-K. Pansaers, Les Artistes Belges Contemporains], Brussels, Eugene de Seyn, 1912 (in French)
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Jean-Philippe Huys and Dominique Marechal, Realism: From Living Art to Free Art, in: Howe, Jeffery W., (editor), Courbet: mapping realism: paintings from the Royal Museums of Fine Arts of Belgium and American collections by Courbet, Gustave, 1819-1877, McMullen Museum of Art; Royal Museums of Fine Arts of Belgium, 2013, p. 24-25