Pernía Santos, B. M., Mero, M., Cornejo, X., Ramírez-Prado, N., Ramírez, L., Bravo, K., … Zambrano, J. (2018). Determination of cadmium and lead in water, sediment and bioindicator organisms in Estero Salado, Ecuador. Enfoque UTE, 9(2), pp. 89 – 105. https://doi.org/10.29019/enfoqueute.v9n2.246