Chmieliński, P., and A. Otłowska. “SELECTED CONDITIONS OF DEVELOPMENT OF NON-AGRICULTURAL ECONOMIC ACTIVITIES IN RURAL AREAS”. Acta Scientiarum Polonorum. Oeconomia, Vol. 6, no. 1, Mar. 2007, pp. 15-24, https://js.wne.sggw.pl/index.php/aspe/article/view/3711.