Touhami, A. O., N. Benjellouna, M. Alamia, and H. Aounia. “Virtual Image and Pupils Conceptual Difficulties in the First Year of Baccalaureate Experimental Sciences”. INTERNATIONAL JOURNAL OF RESEARCH IN EDUCATION METHODOLOGY, vol. 5, no. 3, May 2014, pp. 721-9, doi:10.24297/ijrem.v5i3.3897.