Śmiglak, M., and A. Zielińska. “THE ROLE OF INFORMATION IN PRICE RISK MANAGEMENT IN AGRICULTURE, IN SELECTED COMMUNES IN WIELKOPOLSKA”. Acta Scientiarum Polonorum. Oeconomia, vol. 4, no. 2, Dec. 2005, pp. 77-82, https://aspe.sggw.edu.pl/article/view/933.