Ghafoor, Aamir, Shamoon Naseem, M. Younus, and Jawad Nazir. “Immunomodulatory Effects of Multistrain Probiotics (Protexin™) on Broiler Chicken Vaccinated Against Avian Influenza Virus (H9)”. International Journal of Poultry Science 4, no. 10 (September 15, 2005): 777–780. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/430.