R. . Rodríguez, I. . Morales-Arredondo, y I. Rodríguez, «Geological Differentiation of Groundwater Threshold Concentrations of Arsenic, Vanadium and Fluorine in El Bajio Guanajuatense, Mexico», Geofis Int, vol. 55, n.º 1, pp. 5–15, dic. 2015.