JABALLAH, Ali. Subrings of Q. Journal of Science and Technology, [S. l.], v. 2, n. 2, 2014. DOI: 10.20428/jst.v2i2.219. Disponível em: https://journals.ust.edu/index.php/JST/article/view/219. Acesso em: 22 jan. 2025.