DHEENA, P.; SIVAKUMAR, D. N_c-Pure Regular Near-rings. The Journal of the Indian Mathematical Society, [S. l.], v. 72, n. 1-4, p. 157–161, 2005. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/21828. Acesso em: 4 may. 2024.