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
"Jörgens, K.",Spectral theory of second-order ordinary differential operators,,"Matematisk Institut, Aarhus Universitet",1964,Lecture notes series,,,,https://cir.nii.ac.jp/crid/1130000795910068864