- LPE. 1991.
- LPE. 1991.
- Mireille Ducassé, Gérard Ferrand, editors, Proceedings of the ICLP 1991 Workshop on Logic Programming Environments, Paris, June 1991. Technical Report, University of Orléans, France, LIFO N 91-6. University of Orléans, France, 1991.