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Universal Access in the Information Society > 2017 > 16 > 2 > 517-528
Universal Access in the Information Society > 2016 > 15 > 2 > 189-198
International Advances in Economic Research > 2011 > 17 > 1 > 28-44
Universal Access in the Information Society > 2017 > 16 > 2 > 517-528
Universal Access in the Information Society > 2016 > 15 > 2 > 189-198
International Advances in Economic Research > 2011 > 17 > 1 > 28-44