E.U. Umeh, D. Ishaleku and C.C. Iheukwumere
Journal of Applied Sciences 7 ( 6 ): 933 - 935 , 2007
G.R. Pennap, O. Nwachukwu, D. Ishaleku and R.J. Ombugadu
Research Journal of Medical Sciences 5 ( 2 ): 90 - 93 , 2011