Araújo, Laylles Costa, et al. “Effects of Dietary Protein Level on Intake, Digestibility, and Energy Expenditure in Dairy Heifers”. Semina: Ciências Agrárias, vol. 41, no. 6Supl2, Nov. 2020, pp. 3211-24, doi:10.5433/1679-0359.2020v41n6Supl2p3211.