POWAR, P. L.; ASAAD, B.; RAJAK, K.; KUSHWAHA, R. Operation on Fine Topology. European Journal of Pure and Applied Mathematics, [S. l.], v. 12, n. 3, p. 960–977, 2019. DOI: 10.29020/nybg.ejpam.v12i3.3449. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3449. Acesso em: 5 dec. 2022.