Ostromęcki, A., A. Mantaj, and D. Zając. “THE IMPORTANCE OF NON-AGRICULTURAL ECONOMIC ACTIVITY OF FARMERS IN THE MODERNIZATION PROCESS OF FARMS”. Acta Scientiarum Polonorum. Oeconomia, vol. 14, no. 4, Dec. 2015, pp. 83-92, https://aspe.sggw.edu.pl/article/view/418.