@InProceedings{cheng-EtAl:2006:CLIIR,
  author    = {Cheng, Hua  and  Qu, Yan  and  Montgomery, Jesse  and  Evans, David A.},
  title     = {Exploring Semantic Constraints for Document Retrieval},
  booktitle = {Proceedings of the Workshop on How Can Computational Linguistics Improve Information Retrieval?},
  month     = {July},
  year      = {2006},
  address   = {Sydney, Australia},
  publisher = {Association for Computational Linguistics},
  pages     = {33--40},
  url       = {http://www.aclweb.org/anthology/W/W06/W06-0805}
}