Nagrath IJ, Kothari DP, . (1987). Modern Power System Analysis. New Delhi: TATA MC GRAW HILL.
Nagrath IJ, Kothari DP, . 1987. Modern Power System Analysis. New Delhi: TATA MC GRAW HILL.
Nagrath IJ, Kothari DP, . Modern Power System Analysis. New Delhi: TATA MC GRAW HILL. 1987.