VALDEZ DUFFAU(PHD), Mathias; ANDRADE NARANJO, ING, Alexandra. Contraportada Contraportada. Investigación y Desarrollo, [S. l.], v. 13, n. 1, 2021. DOI: 10.31243/id.v13.2020.1577. DisponÃvel em: https://revistas.uta.edu.ec/erevista/index.php/dide/article/view/1577. Acesso em: 14 may. 2025.