@article {jcgs2003,
	title = {Feature extraction for nonparametric discriminant analysis},
	journal = {Journal of Computational and Graphical Statistics},
	volume = {12},
	number = {1},
	year = {2003},
	pages = {101{\textendash}120},
	doi = {10.1198/1061860031220},
	url = {http://doi.org/10.1198/1061860031220},
	author = {Zhu, Mu and Hastie, Trevor J.}
}
