@article{oai:soar-ir.repo.nii.ac.jp:00012273, author = {ASADA, AKIRA}, 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): 1-12(1968)}, pages = {1--12}, title = {Characteristic Classes of Connections}, volume = {3}, year = {1968} }