Grillo, G. F., Guimarães, A. L. L., do Couto, S. R. B., Figueiredo, M. A., & Palhano, H. B. (2015). Comparison of pregnancy rate between heifers, primiparous and multiparous Nellore submitted to artificial insemination fixed time. Brazilian Journal of Veterinary Medicine, 37(3), 193–197. Retrieved from https://bjvm.org.br/BJVM/article/view/391