Product-Normed Linear Spaces. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 11, n. 3, p. 740–750, 2018. DOI: 10.29020/nybg.ejpam.v11i3.3284. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3284. Acesso em: 21 dec. 2024.