Source: https://www.researchgate.net/profile/Dhaou-Ghoul/publication/302960326_Construction_d'un_corpus_arabe_a_partir_du_Web_dans_le_but_d'identifier_les_mots-outils_ou_tokens/links/5bfe59ea299bf1c2329eced5/Construction-dun-corpus-arabe-a-partir-du-Web-dans-le-but-didentifier-les-mots-outils-ou-tokens.pdf