Energy Efficiency Issues in Ukraine and EU. Economics and region, [S. l.], n. 4(75), p. 75–83, 2019. DOI: 10.26906/eip.2019.4(75).1819. Disponível em: https://ojs35.nupp.edu.ua/eir/article/view/1819. Acesso em: 23 dec. 2025.