BoikoV. M., and FushchichV. I. “Galilei-Invariant Higher-Order Equations of Burgers and Korteweg-De Vries Types”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 12 (December 25, 1996): 1589-1601. Accessed October 6, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5182.