Pierre Effa Onomo, Nicolas Niemenak and Denis Omokolo Ndoumou
Pakistan Journal of Biological Sciences 9 ( 3 ): 391 - 397 , 2006
Pierre Effa Onomo, Nicolas Niemenak and Denis Omokolo Ndoumou
Pakistan Journal of Biological Sciences 9 ( 3 ): 398 - 403 , 2006