Taheri, H.R., H.R. Rahmani, and J. Pourreza. “Humoral Immunity of Broilers Is Affected by Oil Extracted Propolis (OEP) in the Diet”. International Journal of Poultry Science 4, no. 6 (May 15, 2005): 414–417. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/337.