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
"Ballmann, Werner and Gromov, Mikhael and Schroeder, Viktor",Manifolds of nonpositive curvature,,Birkhäuser,1985,Progress in mathematics,,"081763181X,376433181X",,https://cir.nii.ac.jp/crid/1130000797571772928