Shalal, M. S., T. R. Mohammed, and A. F. Majeed. “Histology of Ovine Placenta During Gestation Periods”. Kufa Journal for Veterinary Medical Sciences 3, no. 1 (June 30, 2012): 138–147. Accessed August 24, 2026. https://journal.uokufa.edu.iq/index.php/kjvs/article/view/4073.