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 "O'Regan, Donal",Existence theory for nonlinear ordinary differential equations,,Kluwer,1997,Mathematics and its applications,,0792345118,,https://cir.nii.ac.jp/crid/1130282270323842560