Kawalec, Marcin. 2017. “The Contribution of Polish Thinkers to the Development of the Idea of European Integration”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 6(966) (December): 79-88. https://doi.org/10.15678/ZNUEK.2017.0966.0605.