Dark and Singular Optical Solitons for Kundu-Eckhaus Equation with Differential Group Delay by the Generalized ϕ6-Model Expansion. Contemp. Math. [Internet]. 2025 May 22 [cited 2025 Dec. 24];6(3):3230-52. Available from: https://ojs353.mebyme.cn/index.php/CM/article/view/6902