@inproceedings{Garcia:2011,
	Author = {Diego R. Garcia and Sebastian Gottifredi and Patrick Kr{\"u}mpelmann and Matthias Thimm and Gabriele Kern-Isberner and Marcelo A. Falappa and Alejandro J. Garcia},
	Booktitle = {Proceedings of the 11th International Conference on Logic Programming and Nonmonotonic Reasoning (LPNMR'11)},
	Editor = {James P. Delgrande and Wolfgang Faber},
	Month = {May},
	Pages = {199--204},
	Publisher = {Springer},
	Series = {Lecture Notes in Computer Science},
	Title = {On Influence and Contractions in Defeasible Logic Programming},
	Number = {6645},
	Location = {Vancouver, Canada},
	Year = {2011}}