Będzieszak, Marcin. “Diversification of Operating Own-Source Revenues and Their Amount in Large Cities and Districts in Poland”. Studia Prawno-Ekonomiczne 119 (August 28, 2021): 171–193. Accessed April 28, 2024. https://czasopisma.ltn.lodz.pl/Studia-Prawno-Ekonomiczne/article/view/1291.