Seijó Echevarría, M., R. Del Tóro Déniz, E. Martinez Castellanos, G. A. Sherbakov, and J. J. Rodriguez Moya. “Uses of Natural Zeolite in the Removal of Pb2+ from Contaminated Water”. Eclética Química, vol. 22, no. 1, Dec. 1997, pp. 15-22, doi:10.26850/1678-4618eqj.v22.1.1997.p15-22.