A, Ayat A., Zaid A. T, and Hayder H. I. “Use of Sheep Horn Hydrolysate As Nitrogen Source for Lactic Acid Bacteria Growth”. Journal of Biotechnology Research Center 3, no. 1 (January 1, 2009): 79–84. Accessed May 21, 2025. https://www.jobrc.org/index.php/jobrc/article/view/52.