Abid M, Benssad R, Ferhat-Hamida A, Raissi N, Gourari A, Nejjari S, Hammani A. Colorectal cancer: characteristics of patients aged less than 40 years. 10ème Congrès de l'AMAAC (Arab Medical Association Against Cancer)Alger – Algérie, 30 Avril au 2 Mai . 2010.