@inbook{HeMa97,
	author = {Martin Hellebrandt and Rudolf Mathar},
	title = "Speed and location monitoring for handover control in hierarchical cellular radio networks",
	pages = "383-386",
	publisher = "VDE-Verlag",
	series = "ITG Fachbericht 145 Proceedings EPMCC'97",
	editor = "B. Walke",
	address = "Berlin",
	year = 1997,
	hsb = {RWTH-CONV-223634},
	}