Krzywda, D. 2018. Defining and Classifying Economic Categories in Scientific Research on Contemporary Financial Phenomena. Krakow Review of Economics and Management/Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie. 2(974) (Jul. 2018), 7–23. DOI:https://doi.org/10.15678/ZNUEK.2018.0974.0201.