Krupa, Marcin. “Research Methods in Polemology”. Krakow Review of Economics and Management/Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie, no. 903 (December 21, 2015): 17–34. Accessed November 22, 2024. https://krem.uek.krakow.pl/index.php/krem/article/view/825.