Omojola, A.B., and A.O.K. Adesehinwa. “Performance and Carcass Characteristics of Broiler Chickens Fed Diets Supplemented With Graded Levels of Roxazyme G&Reg”;. International Journal of Poultry Science, vol. 6, no. 5, Apr. 2007, pp. 335–339, https://doi.org/10.3923/ijps.2007.335.339.