@article {varoutas2009demographic,
	title = {Demographic analysis for consumer spend in communications},
	journal = {info},
	volume = {11},
	number = {3},
	year = {2009},
	pages = {97{\textendash}106},
	publisher = {Emerald Group Publishing Limited},
	author = {Varoutas, Dimitris and H{\"a}mm{\"a}inen, Heikki and Welling, Ilari and P{\"o}ll{\"a}nen, Ossi and Eloranta, Lauri}
}
