1. 2013 Report Card for America’s Infrastructure. ASCE, Reston, VA (2013)
2. Global Trends 2030: Alternate Worlds. National Intelligence Council, Washington, DC, vol. 5 (2012)
3. Tweed, K.: Polar Vortex Cripples Power Generation, But Grid Survives, 9 January 2014. http://spectrum.ieee.org . Accessed 1 Nov 2015
4. Duke Energy: Causes of Power Outages (2015). https://www.duke-energy.com . Accessed 5 Nov 2015
5. Calvillo, C.F., et al.: Distributed energy generation in smart cities. In: Paper presented at the International Conference on Renewable Energy Research and Applications, Madrid, Spain, 20–23 October 2013