GUPTA, V. Commutativity of Rings Satisfying a Polynomial Identity. The Journal of the Indian Mathematical Society, [S. l.], v. 70, n. 1-4, p. 255–256, 2003. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/21990. Acesso em: 4 may. 2024.