@inproceedings{avgustinova:2006,
  author    = {Avgustinova, Tania},
  title     = {A functional typology of copular ``be'': {Towards} an {HPSG} formalisation},
  booktitle = {{Proceedings of the 13th International Conference on Head-Driven Phrase Structure Grammar, Varna}},
  editor    = {Müller, Stefan},
  OPTissn   = {15351793},
  doi       = {10.21248/hpsg.2006.2},
  publisher = {CSLI Publications},
  address   = {Stanford, CA},
  pages     = {27--38},
  year      = {2006},
}

@inproceedings{avgustinova:2006-cr,
  crossref  = {HPSG2006},
  author    = {Avgustinova, Tania},
  title     = {A functional typology of copular ``be'': {Towards} an {HPSG} formalisation},
  doi       = {10.21248/hpsg.2006.2},
  pages     = {27--38},
}

@proceedings{HPSG2006,
  editor    = {Müller, Stefan},
  title     = {{Proceedings of the 13th International Conference on Head-Driven Phrase Structure Grammar, Varna}},
  booktitle = {{Proceedings of the 13th International Conference on Head-Driven Phrase Structure Grammar, Varna}},
  publisher = {CSLI Publications},
  address   = {Stanford, CA},
  OPTissn   = {15351793},
  year      = {2006},
}