M.G. El Dawi, Liu Tianyou, Shi Hui and Luo Dapeng
American Journal of Applied Sciences 1 ( 3 ): 209 - 214 , 2004
Tondozi Keto, Liu Tianyou and Ekoko Bakambo
Journal of Applied Sciences 6 ( 1 ): 171 - 176 , 2006
Tondozi keto, Liu Tianyou and Zana Ndotoni
Journal of Applied Sciences 5 ( 10 ): 1858 - 1866 , 2005
Muna G. El Dawi and Liu Tianyou
Journal of Applied Sciences 4 ( 2 ): 257 - 261 , 2004