ChernigaR. M. “Application of One Constructive Method for the Construction of Non-Lie Solutions of Nonlinear Evolution Equations”. Ukrains’kyi Matematychnyi Zhurnal 49, no. 6 (June 25, 1997): 814–827. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5066.