Antamba Guasgua, J. F., Reyes CampaƱa, G. G., & Granja Paredes, M. E. (2016). Comparative study of emission of pollutant gases in vehicle M1, using fuel of the Andean Community. Enfoque UTE, 7(3), pp. 110 - 119. https://doi.org/10.29019/enfoqueute.v7n3.109