Pourquoi j'ai tué Pierre, c2006: t.p. (Olivier Ka)

Bedetheque WWW page, Jan. 18, 2007: author's page (Ka, Olivier; b. Dec. 29, 1967 in Lebanon; son of famous cartoonist [Paul] Carali)

French Wikipedia, Jan. 22, 2007: Olivier Ka page (Olivier Karali alias Olivier Ka, also known under the pseudonym Kaaaa or Kââââ)

Toda una mamá, 2009: t.p. (Olivier Ka) of cover

Biblioteca del congreso (Estados Unidos), 12 marzo 2020: Catálogo electrónico http://bit.ly/2W9euT8