R. GIRIDHARAN; N. RAJESH. Weak Forms Bitopological Semiopen Sets. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 2 - D, p. 165–170, 2016. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/1080. Acesso em: 17 may. 2024.