BERNAT, Tomasz. A Maintenance of a Dominant Market Position – on the Example of the Polish Post Office. Equilibrium. Equilibrium. Quarterly Journal of Economics and Economic Policy. Online. 19 February 2015. Vol. 9, no. 4, pp. 9-20. [Accessed 18 July 2024]. DOI 10.12775/EQUIL.2014.022.