N. L. Ivanenko, “Normal structure of the jonquere group over a field of characteristic zero”, Ukr. Mat. Zhurn., vol. 46, no. 6, pp. 692–698, Jun. 1994, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5696