MIERZEJEWSKI, Mateusz; TOMALA, Justyna. The evolution of profit margins in the energy sector in selected EU countries. Scientific Journal of Bielsko-Biala School of Finance and Law, Bielsko-Biała, PL, v. 28, n. 1, p. 89–95, 2024. DOI: 10.19192/wsfip.sj1.2024.12. Disponível em: https://asej.eu/index.php/asej/article/view/750. Acesso em: 3 jul. 2024.