On the Problem of Exacerbation of Social Contradictions in the Ukrainian Cossack State and the Socio-Economic Policy of the Hetman’s Government of the Ruins Era . University Scientific Notes, [S. l.], n. 4 (82), p. 71–86, 2021. DOI: 10.37491/UNZ.82.6. Disponível em: https://unz.univer.km.ua/index.php/unz/article/view/82_71-86. Acesso em: 15 feb. 2026.