Boiko, V.M. and Fushchich, V.I. (1996) “Galilei-invariant higher-order equations of burgers and korteweg-de vries types”, Ukrains’kyi Matematychnyi Zhurnal, 48(12), pp. 1589–1601. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5182 (Accessed: 5 December 2025).