user- Centre for Health Evidence, (2001)
- Oxford University Press, Second edition, (2003)
- chapter 25, (2003)
- Springer, (2006)
- Health Informatics Springer, Third edition, (2009)
- International Journal on Digital Libraries (1997)
- Cambridge University Press, Cambridge, (1981)
- Proc. Australian Computer Science Conference, Adelaide, (2003)
- Proc. SGML Europe 97, Barcelona, (1997)
- Computer Laboratory, University of Cambridge, (1991)
- (1999)On-line publication .
- Logical Aspects of Computational Linguistics, First International Conference, LACL '96, volume 1328 of Lecture Notes in Computer Science, page 1-20. Springer, (1997)
- Theoria 18(1):27-45 (2003)
- Computational Linguistics Group, University of Zurich, (May 1997)
- Addison-Wesley, Reading, Massachusetts, (1977)
