BavulaV. V. “Description of Bilateral Ideals in a Class of Noncommutative Rings. II”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 3 (March 25, 1993): 307–312. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5814.