1. B. Czyżewski, J. Polcyn and A. Hnatyszyn-Dzikowska, Ekonomicky Casopis 4(10), 973–993 (2016)
2. C.A. Brown, M.P. Jackson, Public Sector Economics, Basil Blackwell, Cambridge 1990.
3. Marketing Tools for Improving Enterprise Performance in the Context of Social and Economic Security of the State: Innovative Approaches to Assessment
4. R.P. Konstytucja (1997), available at https://www.sejm.gov.pl/prawo/konst/polski/kon1.htm
5. A. Walenia, Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu 247, 401–411 (2012).