@InProceedings{chodorow-tetreault-han:2007:Prep07,
  author    = {Chodorow, Martin  and  Tetreault, Joel  and  Han, Na-Rae},
  title     = {Detection of Grammatical Errors Involving Prepositions},
  booktitle = {Proceedings of the Fourth ACL-SIGSEM Workshop on Prepositions},
  month     = {June},
  year      = {2007},
  address   = {Prague, Czech Republic},
  publisher = {Association for Computational Linguistics},
  pages     = {25--30},
  url       = {http://www.aclweb.org/anthology/W/W07/W07-1604}
}