Sanabria, Fernando, and Luz Marina Parra. “Evaluating Ethanolic Extract of Propolis in Broiler Chicken Development and Immunity”. Spei Domus 10, no. 21 (July 13, 2015): 9–27. Accessed July 5, 2026. https://revistas.ucc.edu.co/index.php/sp/article/view/915.