ESPÍN ALARCÓN, Guillermo Enrique. Control of environmental pollution in the construction of the hill tunnels. Revista Universidad de Guayaquil, [S. l.], v. 105, n. 1, p. 77–91, 2008. DOI: 10.53591/rug.v105i1.697. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/565. Acesso em: 15 apr. 2026.