Upper and Lower $s\beta(\star)$-continuous Multifunctions. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 16, n. 3, p. 1634–1646, 2023. DOI: 10.29020/nybg.ejpam.v16i3.4732. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/4732. Acesso em: 23 nov. 2024.