The relationship between interior, closure, exterior and frontier in M- topological spaces via open M-set. Asian Journal of Current Engineering and Maths, [S. l.], v. 6, n. 3, p. 35–38, 2017. DOI: 10.15520/ajcem.2017.vol6.iss3.79.pp35-38. Disponível em: http://informaciontechnologica.com/index.php/ajcem/article/view/1221.. Acesso em: 5 oct. 2024.