LETTER: Variational iteration method for Nonlinear Oscillators: a comment on "Application of Laplace Iteration method to Study of Nonlinear Vibration of laminated composite plates"

1. School of Information Engineering, Zhejiang A&F University, Linan 311300, China 2. National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Ren-Ai Road, Suzhou 215123, China 3. Modern Textile Institute, Donghua University, Shanghai, China