Modeling the Impact of Diversification of Imports on the Natural Gas Market of Ukraine. Economics and region, [S. l.], n. 4(79), p. 15–21, 2020. DOI: 10.26906/EiR.2020.4(79).2160. Disponível em: https://ojs35.nupp.edu.ua/eir/article/view/2160. Acesso em: 23 dec. 2025.