Sec. de: Prévert, Jacques. Dia de folga. 2004 (4. capa: ilustrador)

LC authorities 21/05/09

http://catalogue.bnf.fr/ 21/05/09 (d.n. 02/02/41, em Oostkapelle, Pises Baixos)

http://catalogue.bl.uk/ 21/05/09

http://en.wikipedia.org/wiki/ 21/05/09