@article {deligiorgi2007construction,
	title = {On the construction of price index and the definition of factors affecting tariffs of ADSL connections across Europe},
	journal = {NETNOMICS: Economic Research and Electronic Networking},
	volume = {8},
	number = {1-2},
	year = {2007},
	pages = {171{\textendash}183},
	publisher = {Springer US},
	author = {Deligiorgi, C and Vavoulas, A and Michalakelis, Ch and Varoutas, D and Sphicopoulos, Th}
}
