|Commenced in January 2007||Frequency: Monthly||Edition: International||Publications Count: 29524|
 Gill Young Song, AdvancedEngineering of Power Transmission and Distribution: Dong-il Publish, 1999, p.192-197.
 Lewis Blackburn J. Symmetrical Components for Power Systems Engineering: New York, Marcel Dekker. 1976, p 295-321.
 Il Dong Kim and Raj K. Aggarwal, “A Study on the On-line Measurement of Transmission Line Impedances for Improved Relaying Protection,” Electrical Power & Energy Systems, 28(2006), pp.359-366,2006.
 Kreyszig Erwin. Advanced Engineering Mathematics: 7th Ed. New York; 1993 Wiley (Chapter 18).