1. Abdlmnam A. Abdlrahem and Hamid H Sherwali, “Modeling of numerical distance relays using Matlab”, IEEE Symposium on Industrial Electronics and Applications (ISIEA 2009), October 4-6,2009, Kuala Lumpur, Malaysia.
2. Hadi Saadat, “Power system analysis”, 3rd Edition, PSA Publishing, ISBN 0984543805,9780984543809.
3. L. C. Wu, C.W. Liu and C. S Chen, “Modeling and testing of a digital distance relay using Matlab/Simulink”, IEEE 2005.
4. The Math Works, Inc., “SimPowerSystems user's guide”, Version 4.6,2008. [5] The Math Works, Inc., “GUIDE quick start”, 2008.