@article{asymptoticallyoptimalmultiarmedbandit,
  title = {Asymptotically Optimal Multi-Armed Bandit Policies under a Cost Constraint},
  author = {Apostolos N. Burnetas and Odysseas Kanavetas and Michael N. Katehakis},
  year = {2015},
  eprint = {1509.02857},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1509.02857v3},
}