@article{clusteringunderperturbationresilience,
  title = {Clustering under Perturbation Resilience},
  author = {Maria Florina Balcan and YIngyu Liang},
  year = {2011},
  eprint = {1112.0826},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1112.0826v5},
}