@article {Katsianis2003,
	title = {Business opportunities through UMTS-WLAN networks},
	journal = {Annales des Telecommunications/Annals of Telecommunications},
	volume = {58},
	number = {3-4},
	year = {2003},
	pages = {553-575},
	author = {Varoutas, D and Katsianis, D and Sphicopoulos, T and Loizillon, F. and Kalhagen, K.O. and Stordahl, K. and Welling, I and Harno, J}
}
