Bunchasak, C., & Silapasorn, T. (2005). Effects of Adding Methionine in Low-Protein Diet on Production Performance, Reproductive Organs and Chemical Liver Composition of Laying Hens under Tropical Conditions. International Journal of Poultry Science, 4(5), 301–308. https://doi.org/10.3923/ijps.2005.301.308