Kasimanickam , R.K., Rabie L. Abdel Aziz, V.R. Kasimanickam, and C. Formen. “Calving Date Prediction Based on Transrectal Ultrasonography Determination of Gestational Age in Beef Cattle”. Clinical Theriogenology 9, no. 4 (December 1, 2017): 573-582. Accessed March 31, 2026. https://clinicaltheriogenology.net/index.php/CT/article/view/10006.