Soupault, P. Henri Rousseau le douanier, 1927

Britannica online, Oct. 28, 2004 (Rousseau, Henri; by-name: Le douanier (The Customs Officer); n. May 21, 1844, Laval, France; m. Sept. 2, 1910, Paris, France)

Biog. & geneal. master index, Oct. 28, 2004 (Rousseau, Henri (1844-1910), Rousseau, Henri Julien Felix (1844-1910), Rousseau, Henri-Julien-Felix (1844-1910))

Biog. resource center, Oct. 28, 2004 (Henri Rousseau, Henri (Julien Félix) Rousseau, Rousseau, Henri (in full Henri-Julien-Felix. Known as Le Douanier); n. May 21, 1844, Laval, France; m. Sept. 2, 1910, Paris, France; often called Rousseau le Douanier, "the Customs Officer")

Union list of artists names, Oct. 28, 2004 (Rousseau, Henri (French painter, 1844-1910); variantes: Rousseau, Henri Julien, Rousseau, Henri Julien Felix)

Artcyclopedia, Oct. 28, 2004 (Henri Rousseau; French Post-Impressionist Painter, 1844-1910; also known as: Le douanier Rousseau; not to be confused with Orientalist painter Henri Emilien Rousseau (1875-1933))

LCCN 83158748: Tout l'÷uvre peint de Henri Rousseau, c1982 (240 field: Opera completa di Rousseau il Doganiere)

BnF Web OPAC, Oct. 28, 2004 (Rousseau, Henri (1844-1910); variantes: Rousseau, Le Douanier (1844-1910) pseudonyme, Douanier Rousseau, Le (1844-1910) pseudonyme, Douanier, Le (1844-1910) pseudonyme)

Henri Rousseau: Le Douanier, 1844-1910, 1936: portada (Henry Julien Felix Rousseau)

Union List of Artists Names Online, sitio web, 1 abril 2016: (Rousseau, Henri (French painter, 1844-1910) http://www.getty.edu/vow/ULANFullDisplay?find=Henri+Rousseau&role=&nation=&prev_page=1&subjectid=500115462

Wikipedia, 1 abril 2016: (Henri Julien Félix Rousseau, llamado "El aduanero Rousseau" (Laval, 21 de mayo de 1844 – París, 2 de septiembre de 1910), fue un célebre pintor francés, uno de los máximos representantes del arte naíf.) https://es.wikipedia.org/wiki/Henri_Rousseau