SALAS SALAZAR, M. del R.; HERRERA CHICO, M. F.; LUIS LLAMUCA, J. Variable analysis of quality, economic of taxi operators and the impact of informal service, city of Riobamba. AlfaPublicaciones, [S. l.], v. 4, n. 3, p. 66–81, 2022. DOI: 10.33262/ap.v4i3.223. Disponível em: https://alfapublicaciones.com/index.php/alfapublicaciones/article/view/223. Acesso em: 10 nov. 2026.