@article{oai:repository.dl.itc.u-tokyo.ac.jp:00027754,
 author = {砂田, 利一},
 issue = {2},
 journal = {東京大学理学部弘報},
 month = {Sep},
 note = {application/pdf},
 pages = {5--5},
 title = {数理科学研究科},
 volume = {23},
 year = {1991}
}