1. “Tracking Industry 2020 – Analysis - IEA.” [Online]. Available: https://www.iea.org/reports/tracking-industry-2020. [Accessed: 18-Nov-2021].
2. “Multiple Benefits of Energy Efficiency – Analysis - IEA.” [Online]. Available: https://www.iea.org/reports/multiple-benefits-of-energy-efficiency. [Accessed: 30-Mar-2020].
3. “Industry – Energy Efficiency 2020 – Analysis - IEA.” [Online]. Available: https://www.iea.org/reports/energy-efficiency-2020/industry. [Accessed: 18-Nov-2021].
4. What is energy efficiency?: Concepts, indicators and methodological issues;Patterson;Energy Policy,1996
5. Energy efficiency index as an indicator for measuring building energy performance: A review;Abu Bakar;Renew Sustain Energy Rev,2015