1. Abramson H., Definite Clause Translation Grammars, in: Proceedings of the 1984 International Symposium on Logic Programming, Atlantic City, pp. 233–241.
2. Contributions to the Theory of Logic Programming;Apt;J. Assoc. Comput. Mach.,1982
3. Adding Redundancy to Obtain More Reliable and Readable Prolog Programs;Bruynooghe,1982
4. Predicate Logic as a Computational Formalism;Clark,1979
5. Partial Correctness of Attribute Grammars;Courcelle;Rapports de Recherche,1984