A. I. Patonia, “Keynesianism vs. Classical Economic Theory: European Refugee Crisis and the Fall of Multiculturalism”, JECS, vol. 8, no. 2, pp. 13–20, Sep. 2017, Accessed: May 01, 2026. [Online]. Available: https://jecs.pl/index.php/jecs/article/view/10.15503.jecs20172.13.20