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
"Popivanov, Boris",Changing images of the left in Bulgaria : the challenge of post-communism in the early 21st century,,Ibidem-Verlag,2015,Soviet and post-Soviet politics and society,,9783838207179,,https://cir.nii.ac.jp/crid/1130282272905720832