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)
Akira Ito,A Perturbation Theory of a Quasi-Periodic Motion--An Asymptotic Expansion Method,Progress of theoretical physics = 理論物理学の進歩,0033068X,Kyoto : Publication Office,1979-09,62,3,p620-628,https://cir.nii.ac.jp/crid/1520291855046498432,https://doi.org/10.1143/ptp.62.620