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Almeida, H.B. de, Viana, W.G., Arruda, R.P. de and Oliveira, C.A. de 2001. Estrus synchronization and follicular dynamics of Crioulo mares by norgestomet, melengestrol acetate and altrenogest treatments. Brazilian Journal of Veterinary Research and Animal Science. 38, 6 (Jan. 2001), 267-272. DOI:https://doi.org/10.1590/S1413-95962001000600004.