Dzun, Piotr, and Wiesław Musiał. 2014. “THE IMPACT OF AGRARIAN FRAGMENTATION ON THE DYNAMICS OF REGIONAL CHANGES IN DAIRY CATTLE BREEDING IN THE YEARS 1990-2010”. Acta Scientiarum Polonorum. Oeconomia 13 (1):29-43. https://aspe.sggw.edu.pl/article/view/507.