D. SASIKALA; A. DIVYA. Behavior of open sets in bi-Alexandroff topological space. Malaya Journal of Matematik, India, v. 8, n. 01, p. 48–53, 2020. DOI: 10.26637/MJM0801/0009. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/1323. Acesso em: 16 jul. 2024.