Witoń, A. 2015. Knowledge and Expenditure on Research and Development in EU Countries. Krakow Review of Economics and Management/Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie. 6(942) (Dec. 2015), 21–37. DOI:https://doi.org/10.15678/ZNUEK.2015.0942.0602.