1. Application of He’s homotopy perturbation method to the relativistic (an) harmonic oscillator. I: Comparison between approximate and exact frequencies;Beléndez;International Journal of Nonlinear of Science and Numerical Simulation,2007
2. Some asymptotic methods for strongly nonlinear equations;He;International Journal of Modern Physics B,2006
3. J.-H. He, Nonperturbative methods for strongly nonlinear problems, Dissertation.de-Verlag im Internet GmbH. 2006
4. Comment on ‘He’s frequency formulation for nonlinear oscillators’;He;European Journal of Physics,2008
5. An improved amplitude-frequency formulation for nonlinear oscillators;He;International Journal of Nonlinear Sciences and Numerical Simulation,2008