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 Turnbull, Thomas",Infinite-dimensional optimization and convexity,,University of Chicago Press,1983,Chicago lectures in mathematics,,"0226199878,0226199886",,https://cir.nii.ac.jp/crid/1130282270540369536