@inproceedings{PichlerRuemmeleSzeiderWoltran10,
 author = {Reinhard Pichler and
Stefan R{ü}mmele and
Stefan Szeider and
Stefan Woltran},
 booktitle = {Principles of Knowledge Representation and
Reasoning: Proceedings of the Twelfth International
Conference, KR 2010, Toronto, Ontario, Canada, May
9-13, 2010},
 editor = {Fangzhen Lin and
Ulrike Sattler and
Miroslaw Truszczynski},
 publisher = {AAAI Press},
 title = {Tractable Answer-Set Programming with Weight Constraints:
Bounded Treewidth Is not Enough},
 year = {2010}
}