A. A. Aquino, K. da C. Peixoto Junior, M. L. Gigante, F. P. Rennó, L. F. P. e Silva, and M. V. dos Santos, “Effect of increasing level of dietary urea in diets for dairy cows on composition and yield of Minas Frescal cheese”, Braz. J. Vet. Res. Anim. Sci., vol. 46, no. 4, pp. 273-279, Aug. 2009.