@article {varoutas2009bundling,
	title = {Bundling vertically differentiated communications services to leverage market power},
	journal = {info},
	volume = {11},
	number = {3},
	year = {2009},
	pages = {64{\textendash}74},
	publisher = {Emerald Group Publishing Limited},
	author = {Varoutas, Dimitris and H{\"a}mm{\"a}inen, Heikki and Welling, Ilari and Kr{\"a}mer, Jan}
}
