@article{oai:soar-ir.repo.nii.ac.jp:00012274,
 author = {KACHI,  HIDEYUKI},
 issue = {1},
 journal = {信州大学理学部紀要},
 month = {Sep},
 note = {Article, 信州大学理学部紀要 3(1): 13-33(1968)},
 pages = {13--33},
 title = {On the Homotopy Groups of Rotation Groups Rn},
 volume = {3},
 year = {1968}
}