@InProceedings{wang-agichtein:2010:NAACLHLT,
  author    = {Wang, Yu  and  Agichtein, Eugene},
  title     = {Query Ambiguity Revisited: Clickthrough Measures for Distinguishing Informational and Ambiguous Queries},
  booktitle = {Human Language Technologies: The 2010 Annual Conference of the North American Chapter of the Association for Computational Linguistics},
  month     = {June},
  year      = {2010},
  address   = {Los Angeles, California},
  publisher = {Association for Computational Linguistics},
  pages     = {361--364},
  url       = {http://www.aclweb.org/anthology/N10-1055}
}