著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Ambrosetti, Antonio and Coti Zelati, Vittorio",Periodic solutions of singular Lagrangian systems,,Birkhäuser,1993,Progress in nonlinear differential equations and their applications,,"0817636552,3764336552",,https://cir.nii.ac.jp/crid/1130282272697975680