Barannyk, T.A. “The Classification of the Galilei-Invariant Systems of Nonlinear Reaction-Diffusion Equations”. Reports of the National Academy of Sciences of Ukraine, no. 7 (July 28, 2015): 7–12. Accessed June 20, 2026. https://nasu-periodicals.org.ua/index.php/dp/article/view/15065.