@article{oai:repository.dl.itc.u-tokyo.ac.jp:00041058,
 author = {Nishizawa, Kiyoko},
 journal = {Scientific papers of the College of General Education, University of Tokyo},
 month = {},
 note = {application/pdf},
 pages = {99--102},
 title = {On a Condition of Extension of Maximal Ideals},
 volume = {22},
 year = {1972}
}