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
"Ekeland, Ivar and Temam, Roger",Convex analysis and variational problems,,Society for Industrial and Applied Mathematics,1999,Classics in applied mathematics,,9780898714500,,https://cir.nii.ac.jp/crid/1130282270151209344