Upper and Lower $\alpha$-$\star$-continuity. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 17, n. 1, p. 201–211, 2024. DOI: 10.29020/nybg.ejpam.v17i1.4858. Disponível em: https://ejpam.com/index.php/ejpam/article/view/4858.. Acesso em: 9 may. 2024.