On CSO-Compact Space. Baghdad Science Journal, Iraq, Baghdad, v. 5, n. 4, p. 681–685, 2008. DOI: 10.21123/bsj.2008.5.4.681-685. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/949.. Acesso em: 19 may. 2024.