Cyrek, Piotr. “DIRECTIONS OF CHANGES IN THE OFFER OF RETAILERS AND THEIR CONSTRAINTS”. Acta Scientiarum Polonorum. Oeconomia 9, no. 3 (September 30, 2010): 55-64. Accessed May 5, 2024. https://js.wne.sggw.pl/index.php/aspe/article/view/3908.