@incollection{Webster95-theme,
  author	= {Webster, Jonathan},
  editor	= {Ghadessy, M.},
  title		= {Studying thematic development in on-line help documentation using the Functional Semantic Processor},
  booktitle	= {Thematic development in English texts},
  publisher	= {Pinter Publishers},
  year		= {1995},
  pages		= {259--271},
  address	= {London}
}