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,"2nd ed, Rev. 3rd printing",Springer-Verlag,1998,Die Grundlehren der mathematischen Wissenschaften,,354013025X,,https://cir.nii.ac.jp/crid/1130000797474939392