Conceptual Model for Retail Distribution in Nanostores: The case of the Southwest of Barranquilla, Colombia. - Luis López-Gómez; Simón Marriaga-Chamorro; Andrea Pirabán-Ramírez; Jessica Manosalva-Sandoval; Álvaro Gonzalez-Holgado; Gustavo Gatica (EUSPN/ICTH, 2023)