1. P. Kundur, Power System Stability and Control, McGraw-Hill, 1994.
2. Bevrani, Hassan. Robust power system frequency control. New York: Springer, 2009.
3. E. Ela, M. Milligan, B. Kirby, A. Tuohy and D. Brooks, "Alternative approaches for incentivizing the frequency responsive reserve ancillary service," NREL, March 2012.
4. Eto, Joseph H. "Use of frequency response metrics to assess the planning and operating requirements for reliable integration of variable renewable generation." Lawrence Berkeley National Laboratory (2011).
5. NERC Frequency Response Initiative, April, 2010.