Wu, Guangbing, P. Gunawardana, M.M. Bryant, and D.A. Roland, Sr. 2007. “Effect of Dietary Energy and Protein on Performance, Egg Composition, Egg Solids, Egg Quality and Profits of Hy-Line W-36 Hens During Phase 2”. International Journal of Poultry Science 6 (10): 739–744. https://doi.org/10.3923/ijps.2007.739.744.