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
"Wu, Pei Yuan and Gau, Hwa-Long",Numerical ranges of Hilbert space operators,,Cambridge University Press,2021,Encyclopedia of mathematics and its applications,,9781108479066,,https://cir.nii.ac.jp/crid/1130852082740438664