1. Decidable optimization problems for database logic programs;Cosmadakis;Proc. 20th ACM STOC,1988
2. Parallel evaluation of recursive rule queries;Cosmadakis;Proc. 5th ACM Symp. on Principles of Database Systems,1986
3. Undecidable optimization problems for database logic programs;Gaifman;Proc. 2nd Symp. on Logic in Computer Science,1987
4. A time bound on the materialization of some recursively defined views;Ioannidis;Proc. 11th Internat. Conf. on Very Large Data Bases,1985
5. Logic programming and parallel complexity;Kanellakis,1988