Hryniewski, R., D. Gozdowski, W. Mądry, and B. Roszkowska-Mądra. “TYPOLOGY OF TOBACCO-BASED FARMING SYSTEMS AT THE FARM LEVEL IN SOUTH-EASTERN POLAND”. Acta Scientiarum Polonorum. Oeconomia, vol. 10, no. 1, Mar. 2011, pp. 21-33, https://aspe.sggw.edu.pl/article/view/613.