Walas-Trębacz, J. 2019. Identifying and Creating Sources of Competitive Advantage in an Enterprise’s Value Chain. Krakow Review of Economics and Management/Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie. 5(977) (Feb. 2019), 63–78. DOI:https://doi.org/10.15678/ZNUEK.2018.0977.0504.