@article{oai:soar-ir.repo.nii.ac.jp:00012181,
 author = {ASADA,  AKIRA},
 issue = {2},
 journal = {信州大学理学部紀要},
 month = {Mar},
 note = {Article, 信州大学理学部紀要 13(2): 87-102(1979)},
 pages = {87--102},
 title = {Connections of Differential Operators},
 volume = {13},
 year = {1979}
}