CIVELEK, Mehmet; GAJDKA, Krzysztof; SVĚTLÍK, Jaroslav; VAVREČKA, Vladimír. 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, [S. l.], v. 15, n. 3, p. 537–563, 2020. DOI: 10.24136/eq.2020.024. Disponível em: https://journals.economic-research.pl/eq/article/view/1810. Acesso em: 17 may. 2024.