N. BALAMANI; A. PARVATHI. $\psi^{*}\alpha$-Closed Sets in Bitopological Spaces. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 4 - D, p. 449–456, 2017. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/1291. Acesso em: 18 may. 2024.