Wawrzyniak, Sylwester, and Krystian Ogły. 2002. “STRUCTURAL TRANSFORMATION OF THE POLISH STATE AGRICULTURE SECTOR IN THE LOWER SILESIA REGION AFTER 1991”. Acta Scientiarum Polonorum. Oeconomia 1 (1), 147-59. https://js.wne.sggw.pl/index.php/aspe/article/view/3594.