- kids, specware, planware
- ACM Transactions on Programming Languages and Systems 2(1):90--121 (1980)
- Formal Methods at the Crossroads: From Panacea to Foundational Support, volume 2757 of LNCS, page 267--286. (2003)
- Journal of Logic Programming (1994)
- Encyclopedia of Artificial Intelligence, John Wiley \& Sons, Inc., New York, NY, USA, Second edition, (1992)
- Journal of Symbolic Compututation 1(2):119--142 (1985)
- Journal of the ACM 24(1):44--67 (1977)
- Proceedings of the 12th IEEE International Conference on Automated Software Engineering, ASE'97, page 2-9. (1997)
- KES.U.01.3.. Kestrel Institute, (2001)


user