SAMOILENKO, V. G.; SAMOILENKO, Yu. I. Asymptotic Expansions for One-Phase Soliton-Type Solutions of the Korteweg-De Vries Equation with Variable Coefficients. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 1, p. 111–124, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3578. Acesso em: 6 dec. 2025.