@Inproceedings{aaai/AEHLSS-polyejr,
  author    = {Haris Aziz and Edith Elkind and Shenwei Huang and Martin Lackner and Luis S{\'a}nchez-Fern{\'a}ndez and Piotr Skowron},
  title     = {On the Complexity of Extended and Proportional Justified Representation},
  booktitle = {Proceedings of the 32nd AAAI Conference on Artificial Intelligence (AAAI 2018)},
  year      = {2018},
  pages     = {902--909},
  publisher = {AAAI Press},
}