Zanetti, Diego, et al. “Energy and Protein Requirements of Crossbred Holstein X Zebu Steers Fed Different Levels of Calcium and Phosphorus in the Diet”. Semina: Ciências Agrárias, vol. 37, no. 4Supl1, Sept. 2016, pp. 2665-76, doi:10.5433/1679-0359.2016v37n4Supl1p2665.