O.S. Udeozor and A.N. Nzeako
Environmental Research Journal 4 ( 3 ): 251 - 256 , 2010
M.S. Okundamiya and A.N. Nzeako
International Journal of Electrical and Power Engineering 4 ( 2 ): 54 - 65 , 2010
Journal of Economics Theory 4 ( 1 ): 14 - 19 , 2010