Mussini, F.J., C.A. Coto, S.D. Goodgame, C. Lu, A.J. Karimi, J.H. Lee, and P.W. Waldroup. 2011. “Effect of a ß-Mannanase on Nutrient Digestibility in Corn-Soybean Meal Diets for Broiler Chicks”. International Journal of Poultry Science 10 (10): 774–777. https://doi.org/10.3923/ijps.2011.774.777.