@unpublished{Bateman-etal89-iscworkshop,
  author	= {Bateman, John A. and Kasper, Robert and Matthiessen, Christian M. I. M.},
  year		= {1989},
  title		= {Systemic Linguistics and Natural Language Processing: Case Studies in the Exchange},
  note		= {invited workshop presentation at the International Systemic Congress, East Lansing, Michigan}
}