@article{oai:repository.dl.itc.u-tokyo.ac.jp:00027768,
 author = {鍵, 裕之 and 増田, 彰正},
 issue = {4},
 journal = {東京大学理学部弘報},
 month = {Mar},
 pages = {1--2},
 title = {表紙の説明},
 volume = {22},
 year = {1991}
}