Lee, Y Y.(2012). Analysis of the Nonlinear Structural-Acoustic Resonant Frequencies of a Rectangular Tube with a Flexible End Using Harmonic Balance and Homotopy Perturbation Methods. Abstract and Applied Analysis, 2012, 1-13. doi:10.1155/2012/391584

Lee, Y. Y. "Analysis of the Nonlinear Structural-Acoustic Resonant Frequencies of a Rectangular Tube With a Flexible End Using Harmonic Balance and Homotopy Perturbation Methods". Abstract and Applied Analysis, 2012 ( 2012 ): 1-13.