G. D. Trujillo, G. J. Bórquez, J. M. Pinos-Rodríguez, I. A. Domínguez-Vara, and R. R. Rojo, “Nutritive value of ensiled pig excreta, poultry litter or urea with molasses or bakery by-products in diets for lambs”, SA J. An. Sci., vol. 44, no. 2, pp. 114–122, Jul. 2014.