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
"Curta, Florin and Kovalev, Roman","The other Europe in the Middle Ages : Avars, Bulgars, Khazars, and Cumans",,Brill,2008,"East Central and Eastern Europe in the Middle Ages, 450-1450",,9789004163898,,https://cir.nii.ac.jp/crid/1130000797433354368