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 "Olsson, J. Børling",A characterization of some orthogonal groups,,"Aarhus universitet, Matematisk institut",1971,Preprint series,,,,https://cir.nii.ac.jp/crid/1130282273021718272