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
"Kozlov, Vladimir and Mazʹi︠a︡, V. G.",Theory of a higher-order Sturm-Liouville equation,,Springer,1997,Lecture notes in mathematics,,3540630651,,https://cir.nii.ac.jp/crid/1130000794785654144