@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039704,
 author = {Iwahori, Nobuko},
 issue = {2},
 journal = {Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics = 東京大学理学部紀要. 第1類A, 数学},
 month = {Oct},
 note = {application/pdf},
 pages = {255--260},
 title = {A length formula in a semigroup of mappings : Dedicated to Professor S. Furuya on his 60th birthday},
 volume = {24},
 year = {1977}
}