F. Vaca Ramírez, B. Morales Oñate, and C. Jiménez Mosquera, “Empirical Power and Scaling laws of Quito, Guayaquil and other cities in Ecuador”, ACI Av. Cienc. Ing. (Quito), vol. 7, no. 1, May 2015, doi: 10.18272/aci.v7i1.219.