AL-HAWARY, T. A. <b>&epsilon;-Open sets</b> - doi: 10.4025/actascitechnol.v35i1.15585. Acta Scientiarum. Technology, [S. l.], v. 35, n. 1, p. 111–115, 2012. DOI: 10.4025/actascitechnol.v35i1.15585. Disponível em: https://periodicos.uem.br/actascitechnol/index.php/ActaSciTechnol/article/view/15585. Acesso em: 6 set. 2025.