Kilon, Jarosław. “FOREIGN TRADE IN THE CONVERGENCE PROCESS – RESEARCH METHODOLOGY OF TRADING COMPANIES IN THE PODLASKIE REGION”. Ekonomia i Prawo. Economics and Law 12, no. 4 (December 27, 2014): 565–576. Accessed May 22, 2026. https://apcz.umk.pl/EiP/article/view/EiP.2013.041.