Thomas Eiter, Gerhard Brewka, Minh Dao-Tran, Michael Fink, Giovambattista Ianni, Thomas Krennwallner. Combining Nonmonotonic Knowledge Bases with External Sources. In Silvio Ghilardi, Roberto Sebastiani, editors, Frontiers of Combining Systems, 7th International Symposium, FroCoS 2009, Trento, Italy, September 16-18, 2009. Proceedings. Volume 5749 of Lecture Notes in Computer Science, pages 18-42, Springer, 2009. [doi]
Abstract is missing.