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
"Böhmer, Johann Friedrich and Herbers, Klaus and Unger, Veronika and Arnold, Dorothee and Meyer, Sofia",Papstregesten 800-911,,Böhlaus,1999,Regesta Imperii,,"3412031984,9783412221690",,https://cir.nii.ac.jp/crid/1130000796770139264