K. Mizuta and E. H. Madureira, “Estrus synchronization in Nelore females (Bos taurus indicus) using melengestrol acetate with or without prostaglandin F2alpha”, Braz. J. Vet. Res. Anim. Sci., vol. 36, no. 5, pp. 273–280, Jan. 1999, doi: 10.1590/S1413-95961999000500010.