DEJ, Magdalena and TRZEPACZ, Piotr. Entrepreneurship of Inhabitants vs. Economic Activity of Large and Medium Enterprises in Rural Areas of Selected Historical Regions of Poland. Bulletin of Geography. Socio-economic Series. Online. 6 October 2009. No. 11, p. 89–104. [Accessed 3 July 2024]. DOI 10.1515/v10089-008-0022-6.