BarannykT. A., BarannykA. F., and YurykI. I. “Generalized Separation of Variables and exact solutions of Nonlinear Equations”. Ukrains’kyi Matematychnyi Zhurnal 62, no. 12 (December 25, 2010): 1598 - 1609. Accessed December 4, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2985.