M. Binelli, “Use of hCG, GnRH or 17²-estradiol and progesterone associated with melengestrol acetate and prostaglandin F2± in cross-bred heifers (Bos taurus indicus x Bos taurus taurus)”, Braz. J. Vet. Res. Anim. Sci., vol. 42, no. 4, pp. 237–249, Aug. 2005, doi: 10.11606/issn.1678-4456.bjvras.2005.26417.