@article{JMLR:v15:rooij14a,
  author  = {Steven de Rooij and Tim van Erven and Peter D. Gr{{\"u}}nwald and Wouter M. Koolen},
  title   = {Follow the Leader If You Can, Hedge If You Must},
  journal = {Journal of Machine Learning Research},
  year    = {2014},
  volume  = {15},
  number  = {37},
  pages   = {1281--1316},
  url     = {http://jmlr.org/papers/v15/rooij14a.html}
}