A.U. Adoghe, I.A. Odigwe and S.O. Igbinovia
International Journal of Electrical and Power Engineering 3 ( 1 ): 36 - 42 , 2009
O.S. Onohaebi and S.O. Igbinovia
Journal of Engineering and Applied Sciences 3 ( 6 ): 496 - 503 , 2008