G. M. G. dos Santos, K. C. Silva-Santos, F. A. Melo-Sterza, I. Y. Mizubuti, F. B. Moreira, and M. M. Seneda, “Reproductive performance of woolly and hairless crossbred ewes treated with an exogenous progestagen and eCG hormone during the non-breeding season”, Semina: Ciênc. Agrár., vol. 32, no. 2, pp. 723–732, Jul. 2011.