AL-MOTHAFAR, N. S.; HUMOD, G. A. 2-Regular Modules. Ibn AL- Haitham Journal For Pure and Applied Sciences, [S. l.], v. 28, n. 2, p. 184–192, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/223. Acesso em: 24 may. 2022.