Łapińska, Justyna. “Determinant Factors of Intra-Industry Trade: The Case of Poland and Its European Union Trading Partners”. Equilibrium. Quarterly Journal of Economics and Economic Policy 11, no. 2 (June 30, 2016): 251–264. Accessed January 17, 2026. https://economic-policy.pl/index.php/eq/article/view/135.