@inproceedings{ijcai2009p66,
  title     = {Complexity of Unweighted Coalitional Manipulation under Some Common Voting Rules},
  author    = {Xia, Lirong and Zuckerman, Michael and Procaccia, Ariel D. and Conitzer, Vincent and Rosenschein, Jeffrey S.},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {348--352},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/66},
}