EL KOLLI, Larbi. « HOW FAR HAS “ TIME -SPENT– ON-THE-TASK” BY PUPILS AND TEACHERS PROVED TO BE CRUCIAL VARIABLE IN CLASSROOM RESEARCH? ». Revue Des Sciences Humaines, vol. 19, nᵒ 3, décembre 2008, p. 113-22, http://conferences.umc.edu.dz/h/article/view/799.