Arzhantsev, I. V., E. A. Makedonskii, and A. P. Petravchuk. 2011. “Finite-Dimensional Subalgebras in Polynomial Lie Algebras of Rank One”. Ukrains’kyi Matematychnyi Zhurnal 63 (5), 708-12. https://umj.imath.kiev.ua/index.php/umj/article/view/2755.