@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040135,
 author = {Kawamata, Yujiro},
 issue = {2},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Jul},
 note = {application/pdf},
 pages = {211--231},
 title = {Log crepant birational maps and derived categories},
 volume = {12},
 year = {2005}
}