LUKIC, Radojko. Energy Efficiency and Profitability in the Service Sector: A Comparative Study. Journal of Energy and Environmental Policy Options , [S. l.], v. 4, n. 4, p. 8–14, 2021. Disponível em: http://resdojournals.com/index.php/JEEPO/article/view/261.. Acesso em: 8 jun. 2025.