K. . Ba, A. O. . Toure, E. H. M. . Diop, F. M. . Sambe, and C. G. M. . Diop, “Modelling and Optimizing the Removal of Methylene Blue by a Mixture of Titaniferous Sand and Attapulgite Using Complete Factorial Design”, ESJ, vol. 17, no. 40, p. 88, Nov. 2021.