Yánez-Avalos DO, Lépez Parra JC, Moyano Tapia JC, Quinteros Pozo RO, Marini PR. Fixed-time artificial insemination in beef cattle with prolonged proestrus of 60 and 72 hours. Agron. Mesoam. [Internet]. 2018May1 [cited 2024May6];29(2):363-7. Available from: https://revistas.ucr.ac.cr/index.php/agromeso/article/view/29503