G.N. Akpa, K.A. Koffi, M.R. Hassan, M. Kabir, S. Duru and S.M. Yashim
International Journal of Poultry Science 6 ( 3 ): 218 - 222 , 2007
S. Duru and I. I. Dafwang
International Journal of Poultry Science 9 ( 8 ): 761 - 764 , 2010