A Least-squares Approach to Direct Importance Estimation
Masashi Sugiyama and Takafumi Kanamori and Shohei Hido

@article{10:48,author={Takafumi Kanamori and Shohei Hido and Masashi Sugiyama}, Title={A Least-squares Approach to Direct Importance Estimation},journal={Journal of Machine Learning Research},volume={10}, url={http://www.jmlr.org/papers/volume10/kanamori09a/kanamori09a.pdf}}