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
"Hoffmann-Jørgensen, J. (Jørgen)",On approximation of functions of first Baire class with continous functions,,"Aarhus universitet, Matematisk Institut",1969,Preprint series,,,,https://cir.nii.ac.jp/crid/1130854095210365696