[Kanamori et al. "Statistical Analysis of Kernel-Based Least-Squares Density-Ratio Estimation." Machine Learning, 2012.](https://mlanthology.org/mlj/2012/kanamori2012mlj-statistical/) doi:10.1007/S10994-011-5266-3
@article{kanamori2012mlj-statistical,
title = {{Statistical Analysis of Kernel-Based Least-Squares Density-Ratio Estimation}},
author = {Kanamori, Takafumi and Suzuki, Taiji and Sugiyama, Masashi},
journal = {Machine Learning},
year = {2012},
pages = {335-367},
doi = {10.1007/S10994-011-5266-3},
volume = {86},
url = {https://mlanthology.org/mlj/2012/kanamori2012mlj-statistical/}
}