1. B.A. Oza, N.C. Nair, R.P. Mehta, V.H. Makwana, Power System Protection and Switchgear (Tata Mcgraw Hill, New Delhi, India, 2010)
2. W.A. Elmore, Protective Relaying Theory and Applications (Marcel Dekker Inc., New York, 2004)
3. B.R. Bhalja, R.P. Maheshwari, N.G. Chothani, Protection and Switchgear (Oxford Higher Education, India, 2011)
4. ABB Transmission and Distribution Management Ltd., Protection Application Handbook. (BU TS/Global LEC Support, Sweden)
5. ALSTOM Grid, Network protection & automation guide. Edition May 2011, ISBN:978-0-9568678-0-3