A. SARANYA, O. RAVI. (1,2)*-D ?-Closed Sets in Bitopological Spaces. Mathematical Statistician and Engineering Applications, [S. l.], v. 70, n. 2, p. 1535–1540, 2021. DOI: 10.17762/msea.v70i2.2423. Disponível em: https://www.philstat.org/index.php/MSEA/article/view/2423. Acesso em: 14 may. 2024.