@article{proportionalrankings,
  title = {Proportional Rankings},
  author = {Piotr Skowron and Martin Lackner and Markus Brill and Dominik Peters and Edith Elkind},
  year = {2016},
  eprint = {1612.01434},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1612.01434v1},
}