@article{HeMa99,
	author = {Martin Hellebrandt and Rudolf Mathar},
	title = "Location Tracking of Mobiles in Cellular Radio Networks",
	pages = "1558-1562",
	journal = "{IEEE} Transactions on Vehicular Technology",
	volume = "48",
	number = "5",
	month = Sep,
	year = 1999,
	hsb = {RWTH-CONV-223162},
	}