@article {14064,
	title = {Efficient kernel density estimation using the fast gauss transform with applications to color modeling and tracking},
	journal = {Pattern Analysis and Machine Intelligence, IEEE Transactions on},
	volume = {25},
	year = {2003},
	month = {2003///},
	pages = {1499 - 1504},
	author = {Elgammal,A. and Duraiswami, Ramani and Davis, Larry S.}
}
