Chaabouni, A., C. Chtara, A. Nzihou, and H. E. Feki. “Study the Nature and the Effects of the Impurities of Phosphate Rock in the Plants of Production of Phosphoric Acid”. JOURNAL OF ADVANCES IN CHEMISTRY, vol. 7, no. 2, Jan. 2008, pp. 1296-9, doi:10.24297/jac.v7i2.5560.