Chotkowski, J. “MARKET FACTORS IN THE DEVELOPMENT OF AGRICULTURAL SEED PRODUCTION (ON THE EXAMPLE OF POTATO)”. Acta Scientiarum Polonorum. Oeconomia, Vol. 7, no. 1, Mar. 2008, pp. 33-44, https://js.wne.sggw.pl/index.php/aspe/article/view/3762.