K. Khaskhoussy, B. Kahlaoui, B. Messoudi Nefzi, O. Jozdan, A. Dakheel, and M. Hachicha, “Effect of Treated Wastewater Irrigation on Heavy Metals Distribution in a Tunisian Soil”, Eng. Technol. Appl. Sci. Res., vol. 5, no. 3, pp. 805–810, Jun. 2015.