Laouina, A., M. Aderghal, J. Al Karkouri, M. Antari, M. Chaker, Y. Laghazi, I. Machmachi, N. Machouri, R. Nafaa, K. Naïmi, A. Nouira, and M. Sfa. “The Efforts for Cork Oak Forest Management and Their Effects on Soil Conservation”. Forest Systems, Vol. 19, no. 2, July 2010, pp. 263-77, doi:10.5424/fs/2010192-01320.