Preámbulo. CIENCIA UNEMI, [S. l.], v. 7, n. 12, p. 6, 2015. DOI: 10.29076/issn.2528-7737vol7iss12.2014pp6p. Disponível em: https://ojs.unemi.edu.ec/index.php/cienciaunemi/article/view/94. Acesso em: 7 dec. 2025.