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
"Billigheimer, Calude Elias",Singular boundary problems for a recurrence relation,,"[McMaster University, Department of Mathematics}",1969,McMaster mathematical report,,,,https://cir.nii.ac.jp/crid/1130282268641594880