@incollection{Halliday91-corpus,
  author	= {Halliday, M. A. K.},
  editor	= {Aijmer, Karin and Altenberg, Bengt},
  year		= {1991},
  title		= {Corpus linguistics and probabilistic grammar},
  booktitle	= {English corpus linguistics: studies in honour of Jan Svartvik},
  publisher	= {Longman},
  address	= {London},
  pages		= {30--44}
}