KHELLOU, A., A. HAFSSI, and A. KRIKER. “MODELISATION STATISTIQUE DES PROPRIETES PHYSICO - MECANIQUES DES MATERIAUX SABLO GYPSO-CALCAIRES DE LA REGION DE OUARGLA”. Annals of Science and Technology, Vol. 5, no. 1, May 2013, p. 8, https://journals.univ-ouargla.dz/index.php/AST/article/view/906.