M. C. Teixeira, A. B. Villarroel, E. S. Pereira, S. M. P. de Oliveira, Ítalo A. Albuquerque, and I. Y. Mizubuti, “Growth curve of lambs from three systems of production in Northeastern Brazil”, Semina: Ciênc. Agrár., vol. 33, no. 5, pp. 2011–2018, Oct. 2012.