Arzhantsev, I. V., Makedonskii, E. A., & Petravchuk, A. P. (2011). Finite-dimensional subalgebras in polynomial Lie algebras of rank one. Ukrains’kyi Matematychnyi Zhurnal, 63(5), 708-712. https://umj.imath.kiev.ua/index.php/umj/article/view/2755