@article{oai:soar-ir.repo.nii.ac.jp:00012257,
 author = {KISHIMOTO,  KAZUO},
 issue = {1},
 journal = {信州大学理学部紀要},
 month = {Oct},
 note = {Article, 信州大学理学部紀要 5(1): 25-28(1970)},
 pages = {25--28},
 title = {Note on Quadratic Extensions of Rings},
 volume = {5},
 year = {1970}
}