ARTEMOVYCH, O.D. Rings whose non-zero derivations have finite kernels. Carpathian Mathematical Publications, [S. l.], v. 3, n. 2, p. 13–17, 2011. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/3061. Acesso em: 16 apr. 2025.