He,, J.-H.. "An Improved Amplitude-frequency Formulation for Nonlinear Oscillators"
International Journal of Nonlinear Sciences and Numerical Simulation, vol. 9, no. 2, 2008, pp. 211-212.
https://doi.org/10.1515/IJNSNS.2008.9.2.211
He,, J. (2008). An Improved Amplitude-frequency Formulation for Nonlinear Oscillators.
International Journal of Nonlinear Sciences and Numerical Simulation,
9(2), 211-212.
https://doi.org/10.1515/IJNSNS.2008.9.2.211
He,, J. (2008) An Improved Amplitude-frequency Formulation for Nonlinear Oscillators. International Journal of Nonlinear Sciences and Numerical Simulation, Vol. 9 (Issue 2), pp. 211-212.
https://doi.org/10.1515/IJNSNS.2008.9.2.211
He,, J.-H.. "An Improved Amplitude-frequency Formulation for Nonlinear Oscillators"
International Journal of Nonlinear Sciences and Numerical Simulation 9, no. 2 (2008): 211-212.
https://doi.org/10.1515/IJNSNS.2008.9.2.211
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