QUINTERO, O. L.; JARAMILLO P, F. L.; BASTIDAS, M. Modeling perspective for the relevant market of voice services: Mobile to Mobile. Maskana, [S. l.], v. 6, n. 2, p. 187–201, 2015. DOI: 10.18537/mskn.06.02.13. Disponível em: https://publicaciones.ucuenca.edu.ec/ojs/index.php/maskana/article/view/497. Acesso em: 4 may. 2024.