K. SOWBARNIA. Soft $\tau_1\tau_2\ g^*s$ Closed Sets and Their Mappings in Bi Soft Topological Spaces. International Journal of Mathematics And its Applications, [S. l.], v. 8, n. 1, p. 217–230, 2020. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/194. Acesso em: 27 apr. 2024.