@article{robusthierarchicalclustering,
  title = {Robust Hierarchical Clustering},
  author = {Maria-Florina Balcan and YIngyu Liang and Pramod Gupta},
  year = {2014},
  eprint = {1401.0247},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1401.0247v2},
}