Miranda Mejía, J. R., S. Martínez Gómez, J. F. K. Hernández-Miranda, R. L. Figueroa, and N. Aguirre. “Diagnosis of Atmospheric Pollution Due to Diesel Emissions in the Metropolitan Area of San Salvador and Santa Tecla”. Entorno, no. 61, May 2016, pp. 7-16, doi:10.5377/entorno.v0i61.6125.