@article{volumetricspannersanefficientexploration,
  title = {Volumetric Spanners: an Efficient Exploration Basis for Learning},
  author = {Elad Hazan and Zohar Karnin and Raghu Mehka},
  year = {2013},
  eprint = {1312.6214},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1312.6214v3},
}