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
"Ding, Yanheng",Variational methods for strongly indefinite problems,,World Scientific,2007,Interdisciplinary mathematical sciences,,9789812709622,,https://cir.nii.ac.jp/crid/1130282271731833472