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S. S. Ganji, A. Barari and D. D. Ganji, “Approximate Analyses of Two Mass-Spring Systems and Buckling of a Column,” Computers and Mathematics with Applications, Vol. 61, No. 4, 2011, pp. 1088-1095.
http://dx.doi.org/10.1016/j.camwa.2010.12.059

has been cited by the following article:

• TITLE: Analytical and Approximate Solutions to the Fee Vibration of Strongly Nonlinear Oscillators

  AUTHORS: Taher A. Nofal, Gamal M. Ismail, Amal Ali M. Mady, Sayed Abdel-Khalek

  KEYWORDS: Periodic Solution; Nonlinear Oscillators; Energy Balance Method; Variational Iteration Method

  JOURNAL NAME: Journal of Electromagnetic Analysis and Applications, Vol.5 No.10, October 29, 2013

  ABSTRACT: In this paper, we implement a new approach coupled with the iteration method. This procedure is obtained by combining He’s frequency-amplitude formulation and He’s energy balance method into a new iteration procedure such that excellent approximate analytical solutions, valid for small as well as large values of amplitude, can be determined for nonlinear oscillators. This study has clarified the motion equation of nonlinear oscillators by the iteration method to obtain the relationship between amplitude and angular frequency. We compare the approximate periods obtained by our procedure with the numerical solution and with other methods like energy balance method and variational iteration method. The results show that the approximations are of extreme accuracy.