1. Athay, T., Sherkat, V.R., Podmore, R., Virmani, S., and Puech, C. Transient energy stability analysis, in Systems Engineering for Power: Emergency Operation State Control-Section IV, Davos, Switzerland, U.S. Department of Energy Publication No. Conf.790904-PL, 1979.
2. Aylett, P.D., The energy-integral criterion of transient stability limits of power systems, inProceedings of Institution of Electrical Engineers, 105C(8), London, U.K., pp.527-536, September 1958.