@proceedings{Langendoen:2007,
	title           = {Wireless Sensor Networks (Proceedings of EWSN 2007 Fourth European conference on Wireless Sensor Networks)},
	year            = {2007},
	month           = {jan},
	editor          = {K.G.~Langendoen and T.~Voigt},
	series          = {LNCS},
	address         = {Delft, The Netherlands},
	publisher       = {Springer-Verlag},
	number          = {4373},
	isbn            = {978-3-540-69829-6},
	url             = {http://www.springer.com/?SGWID=5-40109-22-173714304-0},
	project         = {Smart Surroundings},
	topic           = {Sensor Networks},
	group           = {PDS}
}