"Effect of Synchronization Protocols on Timing and Duration of Estrus in Nubian Goats". University of Khartoum Journal of Agricultural Sciences 17, no. 1 (ديسمبر 17, 2025). تاريخ الوصول مايو 25, 2026. https://onlinejournals.uofk.edu/uofkjas/article/view/1999.