ANITHA, B. G. 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: https://innovativejournal.in/index.php/ajcem/article/view/1221. Acesso em: 22 jul. 2024.