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
"Hoffman, David A. and Osserman, Robert",The geometry of the generalized Gauss map,,American Mathematical Society,1980,Memoirs of the American Mathematical Society,,0821822365,,https://cir.nii.ac.jp/crid/1130000794064363264