Bó , G., P. Baruselli, A. Menchaca, and R. Mapletoft. “Evolution of Synchronization Protocols and Use of Fixed Time Artificial Insemination in Beef Cattle in South America”. Clinical Theriogenology, vol. 11, no. 3, Sept. 2019, pp. 255-63, doi:10.58292/ct.v11.9497.