R. N. Furtado, M. S. de S. Carneiro, M. J. D. Cândido, F. H. T. Gomes, M. C. P. Rogério, and D. S. da Silva, “Nitrogen balance and ruminal assessment in male and female sheeps fed rations containing castor cake under different treatments”, Semina: Ciênc. Agrár., vol. 35, no. 6, pp. 3237–3248, Dec. 2014.