Batyk, Iwona. 2013. “IMPACT OF LOCAL BORDER TRAFFIC WITH THE KALININGRAD DISTRICT OF THE RUSSIAN FEDERATION IN SCOPE AND LEVEL MARKETING OF GOODS AND SERVICES”. Acta Scientiarum Polonorum. Oeconomia 12 (4), 5-15. https://js.wne.sggw.pl/index.php/aspe/article/view/4093.