1. IEEE Standard for Synchrophasor Data Transfer for Power Systems,2011
2. Synchronized Phasor and Frequency Measurement Under Transient Conditions;Phadke,2009
3. Fundamental basis for distance relaying with symmetrical components;Phadke,1977
4. A New Measurement Technique for Tracking Voltage Phasors, Local System Frequency, and Rate of Change of Frequency;Phadke,1983
5. https://www.gps.gov/systems/gps/.