O. RAVI; M. RAJAKALAIVANAN; I. RAJASEKARAN. Further Study of $\omega$-closed Sets. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 1 - D, p. 67–72, 2016. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/618. Acesso em: 19 may. 2024.