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 "Müller-Pfeiffer, Erich",Spectral theory of ordinary differential operators,,"E. Horwood,Halsted Press [distributor]",1981,Ellis Horwood series in mathematics and its applications,,"0853121893,0470271035",,https://cir.nii.ac.jp/crid/1130000797826053120