著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) C. S. Hsu,On the Parametric Excitation of a Dynamic System Having Multiple Degrees of Freedom,Journal of Applied Mechanics,0021-8936,ASME International,1963-09-01,30,3,367-372,https://cir.nii.ac.jp/crid/1362262945306070912,https://doi.org/10.1115/1.3636563