FIJAŁ, T. Actions for the greening of power engineering to improve energy efficiency. Economic and Environmental Studies, [S. l.], v. 18, n. 1 (45), p. 127–146, 2020. DOI: 10.25167/ees.2018.45.9. Disponível em: https://czasopisma.uni.opole.pl/index.php/ees/article/view/2580. Acesso em: 3 jan. 2025.