1. The stable model semantics for logic programming;Gelfond,1988
2. Classical negation in logic programs and disjunctive databases;Gelfond;New Gener. Comput.,1991
3. Answer set planning;Lifschitz,1999
4. Gnt—A solver for disjunctive logic programs;Janhunen,2004
5. Disjunctive answer set programming via satisfiability;Lierler,2005