Sampaio, A. A. M., Ezequiel, J. M. B., Oliveira, M. D. S. de, & Vieira, P. de F. (1996). Dry matter, calcium and phosphorus in ovine rations containing cottonseed meal, yeast and urea. Pesquisa Agropecuaria Brasileira, 31(4), 301–304. https://doi.org/10.1590/S1678-3921.pab1996.v31.4485