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Geomatics and Environmental Engineering > 2022 > Vol. 16, no. 4 > 135--155
Telecommunications Policy > 2017 > 41 > 7-8 > 537-554
Studia Ekonomiczne > 2016 > 259 > 28-38
Ekonomický časopis (Journal of Economics) > 2011 > 59 > 2 > 148 – 162