1. A logic based approach to multi-agent systems;Alferes;The Association for Logic Programming Newsletter,2001
2. A compilation of updates plus preferences;Alferes,2002
3. Updates plus preferences;Alferes,2000
4. Well-founded abduction via tabled dual programs;Alferes,1999
5. Abduction in Weil-founded semantics and generalized stable models via tabled dual programs;Alferes;Theory and Practice of Logic Programming,2004