Islam, K.M.S., A. Schuhmacher, H. Aupperle, and J.M. Gropp. “Fumaric Acid in Broiler Nutrition: A Dose Titration Study and Safety Aspects”. International Journal of Poultry Science 7, no. 9 (August 15, 2008): 903–907. Accessed September 21, 2025. https://ijpsjournal.org/index.php/ijps/article/view/1052.