“The Effect of Using L-Arginine As a Feed Additive on Testosterone Levels in Ross 308 Broiler Breeder Roosters: The Effect of Using Arginine on Testosterone Level in Roosters of Broiler Breeders”. 2026. Journal of Hama University 8 (4). https://journal.hama-univ.edu.sy/huj/article/view/2990.