J.C. Ekeh, O.S. James and F.I. Anyasi
International Journal of Electrical and Power Engineering 2 ( 3 ): 166 - 170 , 2008
J.C. Ekeh, E.O. Ikwu, H.R., Torru and C. Akpor
Journal of Engineering and Applied Sciences 3 ( 1 ): 100 - 103 , 2008