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 "Graef, John R. and Kong, Lingju",Multiple solutions of boundary value problems : a variational approach,,World Scientific,2016,Trends in abstract and applied analysis,,9789814696548,,https://cir.nii.ac.jp/crid/1130282269119312640