Okeudo, N.J., et al. “Growth Rate, Carcass Characteristics and Organoleptic Quality of Broiler Fed Graded Levels of Palm Kernel Cake”. International Journal of Poultry Science, vol. 4, no. 5, Apr. 2005, pp. 330–333, https://doi.org/10.3923/ijps.2005.330.333.