DR. M.P. CHAUDHARY. On Topological Sets and Spaces. Global Journal of Science Frontier Research, [S. l.], v. 11, n. 2, p. 29–33, 2011. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/218. Acesso em: 4 may. 2024.