@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040155,
 author = {Masuoka, Akira},
 issue = {4},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {},
 note = {application/pdf},
 pages = {599--630},
 title = {More Homological Approach to Composition of Subfactors},
 volume = {10},
 year = {2003}
}