1. Towards a theory of declarative knowledge;Apt,1988
2. Studies in pure Prolog: termination;Apt,1990
3. Proving termination of general Prolog programs;Apt;Information and Computation,1993
4. Topological Aspects of Logic Programming;Batarekh,1989
5. Topological model set deformations in logic programming;Batarekh;Fundamenta Informaticae,1989