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 "Zeidler, Eberhard and Boron, Leo F.",Variational methods and optimization,,Springer-Verlag,1985,Nonlinear functional analysis and its applications,,"038790915X,354090915X",,https://cir.nii.ac.jp/crid/1130282270539489536