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
"Hamburger, Christoph",Regularity of differential forms minimizing degenerate elliptic functionals,,[s.n.],1989,Bonner mathematische Schriften,,,,https://cir.nii.ac.jp/crid/1130000797837281152