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
"Fraenkel, L. E",An introduction to maximum principles and symmetry in elliptic problems,,Cambridge University Press,2010,Cambridge tracts in mathematics,,9780521172783,,https://cir.nii.ac.jp/crid/1130000795510815488