@article{theexpandingapprovalsruleimproving,
  title = {The Expanding Approvals Rule: Improving Proportional Representation and Monotonicity},
  author = {Haris Aziz and Barton Lee},
  year = {2017},
  eprint = {1708.07580},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1708.07580v2},
}