@inproceedings{crowgey:2012,
  author    = {Crowgey, Joshua},
  title     = {An a priori Typology of Sentential Negation from an HPSG Perspective},
  booktitle = {Proceedings of the 19th International Conference on Head-Driven Phrase Structure Grammar, Chungnam National University Daejeon},
  editor    = {Stefan M{\"u}ller},
  OPTissn   = {15351793},
  url       = {http://cslipublications.stanford.edu/HPSG/2012/crowgey.pdf},
  pages     = {107--122},
  year      = {2012},
}

@inproceedings{crowgey:2012-cr,
  crossref  = {Mueller2012a-ed},
  author    = {Crowgey, Joshua},
  title     = {An a priori Typology of Sentential Negation from an HPSG Perspective},
  url       = {http://cslipublications.stanford.edu/HPSG/2012/crowgey.pdf},
  pages     = {107--122},
}

@proceedings{Mueller2012a-ed,
  editor    = {Stefan M{\"u}ller},
  title     = {Proceedings of the 19th International Conference on Head-Driven Phrase Structure Grammar, Chungnam National University Daejeon},
  booktitle = {Proceedings of the 19th International Conference on Head-Driven Phrase Structure Grammar, Chungnam National University Daejeon},
  OPTissn   = {15351793},
  url       = {http://cslipublications.stanford.edu/HPSG/2012/},
  year      = {2012},
}