In: Ronald A. Cole; Joseph Mariani; Hans Uszkoreit; Annie Zaenen; Victor Zue (Hrsg.). Survey of the State of the Art in Human Language Technology. Pages 147-151, ISBN 0-521-52977-1, Cambridge University Press, Cambridge, 1997.
In: Paul Jacobs (Hrsg.). Proceedings of the 5th Conference on Applied Natural Language Processing (ANLP '97), March 31 - April 3. Applied Natural Language Processing Conference (ANLP), Washington D.C., USA, Pages 208-215, Morgan Kaufmann Publishers, 1997.