@article{JMLR:v8:sugiyama07a,
  author  = {Masashi Sugiyama and Matthias Krauledat and Klaus-Robert M{{\"u}}ller},
  title   = {Covariate Shift Adaptation by Importance Weighted Cross Validation},
  journal = {Journal of Machine Learning Research},
  year    = {2007},
  volume  = {8},
  number  = {35},
  pages   = {985--1005},
  url     = {http://jmlr.org/papers/v8/sugiyama07a.html}
}