@article {Katsianis2004,
	title = {Designing and implementing an open infrastructure for location-based, tourism-related content delivery},
	journal = {Wireless Personal Communications},
	volume = {30},
	number = {2-4},
	year = {2004},
	pages = {153-165},
	author = {Kakaletris, G. and Varoutas, D and Katsianis, D and Sphicopoulos, T and Kouvas, G.}
}
