@InProceedings{cao-robertson-nie:2008:ACLMain,
  author    = {Cao, Guihong  and  Robertson, Stephen  and  Nie, Jian-Yun},
  title     = {Selecting Query Term Alternations for Web Search by Exploiting Query Contexts},
  booktitle = {Proceedings of ACL-08: HLT},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  pages     = {148--155},
  url       = {http://www.aclweb.org/anthology/P/P08/P08-1018}
}