@inproceedings{onlinesubmodularsetcoverrankingand,
  title = {Online Submodular Set Cover, Ranking, and Repeated Active Learning},
  author = {Andrew Guillory and Jeff A. Bilmes},
  year = {2011},
  booktitle = {NeurIPS 2011 12},
  url = {http://papers.nips.cc/paper/4465-online-submodular-set-cover-ranking-and-repeated-active-learning},
}