A. DEVIKA; P. PERIANAYAKI. On **$b$-$t$**-sets and **$b$-**$t$-sets in Topological Spaces. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 1 - A, p. 69–79, 2016. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/547. Acesso em: 22 may. 2024.