@article {kakaletris2007design,
	title = {Design. and. Implementation. Approaches. for. Location-Based,. Tourism-Related. Services},
	journal = {Information and Communication Technologies in Support of the Tourism Industry},
	year = {2007},
	pages = {114},
	publisher = {Igi Global},
	author = {Kakaletris, George and Varoutas, Dimitris and Katsianis, Dimitris and Sphicopoulos, Thomas}
}
