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
"Piene, Ragni",Degenerations of complete twisted cubics,,"Universitetet i Oslo, Matematisk institutt",1982,Preprint series,,8255304789,,https://cir.nii.ac.jp/crid/1130000794826421760