Chauynarong, N., et al. “The Influence of an Exogenous Microbial Enzyme Supplement on Feed Consumption, Body Growth and Follicular Development of Pre-Lay Pullets on Maize-Soy Diets ”. International Journal of Poultry Science, vol. 7, no. 3, Feb. 2008, pp. 257–262, https://doi.org/10.3923/ijps.2008.257.262.