AL- SWEEDY, L.; DELFI ALI, R. L-open sets in bitopological spaces. مجلة المستنصرية للعلوم والتربية, [S. l.], v. 17, n. 5, p. 339–350, 2020. Disponível em: https://edumag.uomustansiriyah.edu.iq/index.php/mjse/article/view/148. Acesso em: 28 2024.