J. L. Espinoza Villavicencio, A. Palacios-Espinosa, R. Ortega-Pérez, A. Guillén-Trujillo, and E. Manríquez-Hirales, “Fixed-time artificial insemination and reinsemination of beef cows treated with and without equine chorionic gonadotropin”, NS, vol. 13, no. 27, Sep. 2021.