CIEŚLIK, Andrzej, MICHAŁEK, Jan Jakub and MYCIELSKI, Jerzy. Social Development and International Trade in Central Europe. Equilibrium. Equilibrium. Quarterly Journal of Economics and Economic Policy. Online. 6 June 2012. Vol. 7, no. 2, pp. 7-19. [Accessed 30 April 2024]. DOI 10.12775/EQUIL.2012.008.