@article{JMLR:v8:kuzmin07a,
  author  = {Dima Kuzmin and Manfred K. Warmuth},
  title   = {Unlabeled Compression Schemes for Maximum Classes},
  journal = {Journal of Machine Learning Research},
  year    = {2007},
  volume  = {8},
  number  = {70},
  pages   = {2047--2081},
  url     = {http://jmlr.org/papers/v8/kuzmin07a.html}
}