P.C, W.; K.B2, W. On Residual Properties of Nilpotent Groups. Malaysian Journal of Science, [S. l.], v. 24, n. 2, p. 133–138, 2005. Disponível em: https://mjs.um.edu.my/index.php/MJS/article/view/8370. Acesso em: 12 may. 2024.