SAHA, P. K.; LAHIRI, B. K. Density Topology in Romanovski Spaces. The Journal of the Indian Mathematical Society, [S. l.], v. 54, n. 1-4, p. 65–84, 1989. Disponível em: https://informaticsjournals.co.in/index.php/jims/article/view/21874. Acesso em: 7 nov. 2024.