E. A. Llanes Cedeño, J. C. Rocha-Hoyos, D. B. Peralta Zurita, and J. C. Leguísamo Milla, “Evaluation of gas emissions in light gasoline vehicles in height conditions. Case study Quito, Ecuador”, Enfoque UTE, vol. 9, no. 2, pp. pp. 149 – 158, Jun. 2018.