Iazzolino, Gianpaolo, and Rossella Gabriele. “Energy Efficiency and Sustainable Development: An Analysis of Financial Reliability in Energy Service Companies Industry”. International Journal of Energy Economics and Policy 6, no. 2 (April 17, 2016): 222–233. Accessed January 26, 2025. https://mail.econjournals.org.tr/index.php/ijeep/article/view/1926.