P. JEYALAKSHMI. Nano $\mathcal{O}_{16}$-closed Sets. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 2 - B, p. 151–156, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/711. Acesso em: 3 jul. 2024.