1. Arrillaga, J., Watson, N. R. and Chen, S. 2000.Power System Quality Assessment, 105–110. London: John Wiley & Sons Ltd.
2. John, A. “Survey of the recent voltage sag papers from around the world,”. Proceedings of IEEE/IAS Industrial And Commercial Power System Annual Technical Conference. St. Petersburg, FL, USA. pp.52–54.
3. A neural-fuzzy classifier for recognition of power quality disturbances