Lien, R.J., et al. “Effects of Early Skip-A-Day Feed Removal and Litter Material on Broiler Live and Processing Performance and Litter Bacterial Levels ”. International Journal of Poultry Science, vol. 7, no. 2, Jan. 2008, pp. 110–116, https://doi.org/10.3923/ijps.2008.110.116.