ON M- Hollow modules. Baghdad Science Journal, Iraq, Baghdad, v. 7, n. 4, p. 1442–1446, 2010. DOI: 10.21123/bsj.2010.7.4.1442-1446. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1123.. Acesso em: 3 may. 2024.