J. Sykes, V. Madani, J. Burger, M. Adamiak and W. Premerlani, “Reliability of Protection Systems (What Are The Real Concerns),” Proceeding of IEEE conference on Protective Relay Engineers, College Station, 29 March-1 April 2010, pp. 1-16.
 D. D. Shipp and F. J. Angelini, “Characteristics of Different Power Systems Neutral Grounding Techniques: Facts and Fiction,” IEEE Industry Technical Conference, Seattle, 18-22 June 1990, pp. 107-116.
 D. Paul and S. I. Venugopalan, “Low-Resistance Grounding Method for Medium Voltage Power Systems,” Industry Applications Society Annual Meeting of IEEE Conference, Dearborn, 28 September-4 October 1991, pp. 1571-1578.
 S. Hanninen, “Single Phase Earth Faults in High Impedance Grounded Networks Characteristics, Indication and Location,” Valtion Teknillinen Tutkimuskeskus Technical Re- search Centre of Finland, Espoo, 2001.
 L. A. Kojovic, T. R. Day and H. H. Chu, “Effectiveness of Restricted Ground Fault Protection with Different Relay Types,” Power Engineering Society General Meeting, IEEE, 13-17 July 2003, pp. 1-6.
 Y. Y. Wang and X. J. Zeng, “Grourding Faurt Protection with Sampling Value Difference in Ineffectively Earthed Power Systems,” International Conference on Power System Technology, Chongqing, 22-26 October 2006. doi:10.1109/ICPST.2006.321438