著者名,タイトル,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI)
"Ignatyev, A. O.",Stability of a linear oscillator with variable parameters,Electron. J. Differential Equations,,,1997,,,"No. 17, 6",https://cir.nii.ac.jp/crid/1370006895453323531,