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 "Positselski, Leonid",Relative nonhomogeneous Koszul duality,,"Birkhäuser,Springer",2021,Frontiers in mathematics,,9783030895396,,https://cir.nii.ac.jp/crid/1130291776119904273