The Surface and accesibility to urban green spaces of Puerto Bolívar Parish in the city of Machala, Province of El Oro, Ecuador. Revista Científica Ciencias Naturales y Ambientales, [S. l.], v. 8, n. 1, p. 8, 2014. DOI: 10.53591/cna.v8i1.227. Disponível em: https://revistas.ug.edu.ec/index.php/cna/article/view/1724. Acesso em: 5 dec. 2025.