SARMA, R. D. Frontiers of Topology. Journal of Informatics and Mathematical Sciences, [S. l.], v. 2, n. 2 & 3, p. 109–119, 2010. DOI: 10.26713/jims.v2i2 & 3.31. Disponível em: http://rgnpublications.com/journals/index.php/jims/article/view/31. Acesso em: 24 nov. 2024.