Foreword. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 13, n. 5, p. 1055–1056, 2020. DOI: 10.29020/nybg.ejpam.v13i5.3863. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3863.. Acesso em: 28 apr. 2024.