O. RAVI , V. J. R. . UNIFIED APPROACH TO D-SETS IN TOPOLOGY. Mathematical Statistician and Engineering Applications, [S. l.], v. 70, n. 2, p. 1919–1930, 2021. DOI: 10.17762/msea.v70i2.2548. Disponível em: https://www.philstat.org/index.php/MSEA/article/view/2548. Acesso em: 13 may. 2024.