@article {SomPud:20040093,
	title = {Fast Branch \& Bound algorithms for optimal feature selection},
	journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
	volume = {26},
	number = {7},
	year = {2004},
	pages = {900-912},
	author = {Somol, P. and Pudil, P. and Kittler, J.}
}
