@incollection{Ventola88,
  author	= {Ventola, Eija},
  editor	= {Benson, James D. and Greaves, William S.},
  year		= {1988},
  title		= {The logical relations in exchanges},
  booktitle	= {Systemic Functional Approaches to Discourse: Selected Papers from the Twelfth International Systemic Workshop},
  pages		= {51--72},
  publisher	= {Ablex},
  address	= {Norwood, New Jersey}
}