SamoilenkoV. G., & SamoilenkoY. I. (2007). Asymptotic solutions of the Cauchy problem for the singularly perturbed Korteweg-de Vries equation with variable coefficients. Ukrains’kyi Matematychnyi Zhurnal, 59(1), 122–132. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3295