@inproceedings{parameterfreeonlinelearningviamodel,
  title = {Parameter-free online learning via model selection},
  author = {Dylan J. Foster and Satyen Kale and Mehryar Mohri and Karthik Sridharan},
  year = {2017},
  booktitle = {NeurIPS 2017 12},
  eprint = {1801.00101},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1801.00101v2},
}