Variational Principles and Solitary Wave Solutions of Generalized ‎Nonlinear Schrödinger Equation in the Ocean by Meng-Zhu Liu, Xiao-Qun Cao, Xiao-Qian Zhu, Bai-Nian Liu, Ke-Cheng Peng

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Variational Principles for Two Compound Nonlinear Equations ‎with Variable Coefficients by Xiao-Qun Cao, Ke-Cheng Peng, Meng-Zhu Liu, Cheng-Zhuo Zhang, Ya-Nan Guo

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Different Groups of Variational Principles for Whitham-Broer-‎Kaup Equations in Shallow Water by Xiao-Qun Cao, Ya-Nan Guo, Cheng-Zhuo Zhang, Shi-Cheng Hou, Ke-Cheng Peng

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New Variational Principles for Two Kinds of Nonlinear Partial Differential Equation in Shallow Water by Xiao-Qun Cao, Meng-Ge Zhou, Si-Hang Xie, Ya-Nan Guo, Ke-Cheng Peng

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