@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040131,
 author = {Ambro, Florin},
 issue = {3},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Nov},
 note = {application/pdf},
 pages = {445--466},
 title = {A Semiampleness Criterion},
 volume = {12},
 year = {2005}
}