B. SRIDEVI; K. SUVARNA. Commutativity of Periodic Rings with Some Identities in the Center. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 1 - C, p. 589–596, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1108. Acesso em: 3 jul. 2024.