@article{JMLR:v7:cesa-bianchi06a,
  author  = {Nicol{{\'o}} Cesa-Bianchi and Claudio Gentile and Luca Zaniboni},
  title   = {Incremental Algorithms for Hierarchical Classification},
  journal = {Journal of Machine Learning Research},
  year    = {2006},
  volume  = {7},
  number  = {2},
  pages   = {31--54},
  url     = {http://jmlr.org/papers/v7/cesa-bianchi06a.html}
}