@inproceedings{DudikHKKLRZ11,
  author = {Miroslav Duduk and 
            Daniel Hsu and 
            Satyen Kale and 
            Nikos Karampatziakis and 
            John Langford and 
            Lev Reyzin and 
            Tong Zhang}, 
  title = {Efficient Optimal Learning for Contextual Bandits}, 
  booktitle = {ICML Workshop on Online Trading off Exploration and Exploitation 2}, 
  year = {2011}
}