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Ekonomia XXI Wieku > 2014 > 2(2) > 34-44
Central European Journal of Economic Modelling and Econometrics > 2013 > 5 > 2 > 125-161
Ekonomia XXI Wieku > 2014 > 2(2) > 34-44
Central European Journal of Economic Modelling and Econometrics > 2013 > 5 > 2 > 125-161