Abdukalykova, Saule, and Ciro A. Ruiz-Feria. “Arginine and Vitamin E Improve the Cellular and Humoral Immune Response of Broiler Chickens”. International Journal of Poultry Science, vol. 5, no. 2, Jan. 2006, pp. 121–127, https://doi.org/10.3923/ijps.2006.121.127.