Owsiak, Katarzyna. “The Expenditure of Local Government Units in Poland in 2010–2013”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 8(932), Nov. 2015, pp. 79-91, https://doi.org/10.15678/ZNUEK.2014.0932.0806.