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
"Gray, Brayton and Kristensen, Leif",On the homotopy groups of a wedge,,"Aarhus universitet, Matematisk Institut",1969,Preprint series,,,,https://cir.nii.ac.jp/crid/1130571536477111957