Almeida HB de, Viana WG, Arruda RP de, Oliveira CA de. Estrus synchronization and follicular dynamics of Crioulo mares by norgestomet, melengestrol acetate and altrenogest treatments. Braz. J. Vet. Res. Anim. Sci. 2001;38(6):267-272. doi:10.1590/S1413-95962001000600004