1. B. Hirl, Energy Efficiency Status Report. 2012. (PDF).
2. BP: Statistical Review of World Energy, Workbook (xlsx), London, 2013.
3. York, D., Kushler, M., & Witte, P. (2007, February). Examining the peak demand impacts of energy efficiency: A review of program experience and industry practices. Washington, DC: American Council for an Energy-Efficient Economy.
4. Siemens Environmental Portfolio Report, 2014. (PDF).
5. Parra, J., Hossain, M.A., Uribarren, A., Jacob, E., & El Saddik, A. (2009). Flexible smart home architecture using device profile for web services: A peer-to-peer approach. International Journal of Smart Home, 3(2), 39-56.