HentoshО. Ye., and A. K. Prykarpatsky. “Lie-Algebraic Structure of (2 + 1)-Dimensional Lax-Type Integrable Nonlinear Dynamical Systems”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 7 (July 25, 2004): 939–946. Accessed May 1, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3810.