D. O. Yánez-Avalos, J. C. Lépez Parra, J. C. Moyano Tapia, R. O. Quinteros Pozo, and P. R. Marini, “Fixed-time artificial insemination in beef cattle with prolonged proestrus of 60 and 72 hours”, Agron. Mesoam., vol. 29, no. 2, pp. 363–373, May 2018.