Nan, Jizhu, and Yufang Qin. “On the Invariants of Root Subgroups of Finite Classical Groups”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 12 (December 25, 2013): 1636–1645. Accessed April 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2542.