@inproceedings{mueller-oersnes:2013,
  author    = {M\"{u}ller, Stefan and {\O}rsnes, Bjarne},
  title     = {Passive in {Danish}, {English}, and {German}},
  booktitle = {Proceedings of the 20th International Conference on Head-Driven Phrase Structure Grammar, Freie Universit\"{a}t Berlin},
  editor    = {Stefan M\"{u}ller},
  OPTissn   = {15351793},
  url       = {http://cslipublications.stanford.edu/HPSG/2013/mueller-oersnes.pdf},
  publisher = {CSLI Publications},
  address   = {Stanford, CA},
  pages     = {140--160},
  year      = {2013},
}

@inproceedings{mueller-oersnes:2013-cr,
  crossref  = {Mueller2013a-ed},
  author    = {M\"{u}ller, Stefan and {\O}rsnes, Bjarne},
  title     = {Passive in {Danish}, {English}, and {German}},
  url       = {http://cslipublications.stanford.edu/HPSG/2013/mueller-oersnes.pdf},
  pages     = {140--160},
}

@proceedings{Mueller2013a-ed,
  editor    = {Stefan M\"{u}ller},
  title     = {Proceedings of the 20th International Conference on Head-Driven Phrase Structure Grammar, Freie Universit\"{a}t Berlin},
  booktitle = {Proceedings of the 20th International Conference on Head-Driven Phrase Structure Grammar, Freie Universit\"{a}t Berlin},
  publisher = {CSLI Publications},
  address   = {Stanford, CA},
  OPTissn   = {15351793},
  url       = {http://cslipublications.stanford.edu/HPSG/2013/},
  year      = {2013},
}