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
"Friedrichs, K. O. (Kurt Otto)",Spectral theory of operators in Hilbert space,"2nd, corr. printing",Springer,1980,Applied mathematical sciences,,"0387900764,3540900764",,https://cir.nii.ac.jp/crid/1130000796369268736