@inproceedings{CTT100605112,
  author = {Sugiyama, M. and Hara, S. and von Bünau, P. and Suzuki, T. and Kanamori, T. and Kawanabe, M.},
  title = {Direct density ratio estimation with dimensionality reduction.},
  booktitle = {Proceeding of the 10th SIAM International Conference on Data Mining(SDM2010)},
  year = 2010,
}

@inproceedings{CTT100592360,
  author = {Sugiyama, M. and Hara, S. and von Bünau, P. and Suzuki, T. and Kanamori, T. and Kawanabe, M.},
  title = {Dimensionality reduction for density ratio estimation based on Pearson divergence maximization.},
  booktitle = {},
  year = 2009,
}