Powęska, Halina. 2014. “THE SHARE OF CROSS-BORDER SHOPPING IN POLAND'S TRADE TURNOVER OF FOOD PRODUCTS WITH THE NEIGHBOURING COUNTRIES ON THE EU'S EXTERNAL BORDER”. Acta Scientiarum Polonorum. Oeconomia 13 (4), 147-55. https://js.wne.sggw.pl/index.php/aspe/article/view/4150.