@article{JMLR:v18:16-632,
  author  = {Ohad Shamir},
  title   = {An Optimal Algorithm for Bandit and Zero-Order Convex Optimization with Two-Point Feedback},
  journal = {Journal of Machine Learning Research},
  year    = {2017},
  volume  = {18},
  number  = {52},
  pages   = {1--11},
  url     = {http://jmlr.org/papers/v18/16-632.html}
}