Civelek, Mehmet, Krzysztof Gajdka, Jaroslav Světlík, and Vladimír Vavrečka. 2020. “Differences in the Usage of Online Marketing and Social Media Tools: Evidence from Czech, Slovakian and Hungarian SMEs”. Equilibrium. Quarterly Journal of Economics and Economic Policy 15 (3):537-63. https://doi.org/10.24136/eq.2020.024.