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 "Sakhnovich, L. A.",Spectral theory of canonical differential systems : method of operator identities,,Birkhäuser Verlag,1999,Operator theory : advances and applications,,"3764360577,0817660577",,https://cir.nii.ac.jp/crid/1130282270174067072