M. Ebadi, J. Pourreza, J. Jamalian, M. Edriss, A. Samie, and S. Mirhadi, “Amino Acid Content and Availability in Low, Medium and High Tannin Sorghum Grain for Poultry”, Int. J. Poult. Sci., vol. 4, no. 1, pp. 27–31, Dec. 2004, doi: 10.3923/ijps.2005.27.31.