Logic Programming and Nonmonotonic Reasoning : 10th International Conference, LPNMR 2009, Potsdam, Germany, September 14-18, 2009, Proceedings - Erdem, Esra (Herausgeber); Lin, Fangzhen (Herausgeber); Schaub, Torsten (Herausgeber) (Lecture Notes in Artificial Intelligence, 2009)