Bonato, Denis Vinicius, et al. “Estrus Expression and Pregnancy Rates in Heifers Primiparous and Multiparous Nelore Cows Subjected to Timed Artificial Insemination With Strategic Use of Gonadotropin-Releasing Hormone”. Semina: Ciências Agrárias, vol. 42, no. 6SUPL2, Oct. 2021, pp. 3825-36, doi:10.5433/1679-0359.2021v42n6SUPL2p3825.