Castro-Garzón, Hernando, Rodríguez Miranda, Juan Pablo, Rivas Trujillo, Edwin. “Commercıal Informalıty: Analysis of the Occupation of Public Space in a Sector of Villavicencio City (Meta Colombia)”. International Journal of Advanced Science and Technology, Vol. 29, no. 7, July 2020, pp. 11859 -65, http://sersc.org/journals/index.php/IJAST/article/view/27860.