@article{JMLR:v17:13-533,
  author  = {Dmitry Adamskiy and Wouter M. Koolen and Alexey Chernov and Vladimir Vovk},
  title   = {A Closer Look at Adaptive Regret},
  journal = {Journal of Machine Learning Research},
  year    = {2016},
  volume  = {17},
  number  = {23},
  pages   = {1--21},
  url     = {http://jmlr.org/papers/v17/13-533.html}
}