@article{JMLR:v10:hu09a,
  author  = {Ting Hu and Ding-Xuan Zhou},
  title   = {Online Learning with Samples Drawn from Non-identical Distributions},
  journal = {Journal of Machine Learning Research},
  year    = {2009},
  volume  = {10},
  number  = {98},
  pages   = {2873--2898},
  url     = {http://jmlr.org/papers/v10/hu09a.html}
}