[1]
O. P. Gómez-Rojas, M. Díaz-Lagos, A. Blandón-Montes, and S. A. Martínez-Ovalle, “Presence of contamination by As Cd, As, Pb, Se, and Hg in coals of the Cundiboyacense area, Colombia”, rev. investig. desarro. innov, vol. 7, no. 1, pp. 141–150, Dec. 2016.