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 "Courant, Richard and Moser, J. and Kruskal, Martin",Calculus of variations,,"New York University, Courant Institute of Mathematical Sciences",1962,Courant Institute of Mathematical Sciences,,,,https://cir.nii.ac.jp/crid/1130000794672124672