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
"Edmunds, David Eric and Evans, W. D.",Spectral theory and differential operators,,Clarendon Press,1987,Oxford mathematical monographs,,0198535422,,https://cir.nii.ac.jp/crid/1130282268833933568