Full Citation:
Sebastian Ordyniak, Stefan Szeider. Augmenting Tractable Fragments of Abstract Argumentation. Proceedings of the 22nd International Joint Conference on Artificial Intelligence, IJCAI 2011 (Toby Walsh), pages 1033-1038, 2011, AAAI Press/IJCAI.
Stefan Szeider is a Professor at the Algorithms and Complexity Group.