The Nonlinear Schrödinger Equation Derived from the Third Order Korteweg-de Vries Equation Using Multiple Scales Method. Contemp. Math. [Internet]. 2024 Nov. 14 [cited 2025 Dec. 24];5(4):5087-9. Available from: https://ojs353.mebyme.cn/index.php/CM/article/view/4647