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
"Gilbarg, David and Trudinger, Neil S.",Elliptic partial differential equations of second order,,Springer,2001,Classics in mathematics,,9783540411604,,https://cir.nii.ac.jp/crid/1130282270033484160