Lazzeri, Doglas Batista, et al. “Standardized Ileal Digestible (SID) Isoleucine Requirement of Barrows (15- to 30- Kg) Fed Low Crude Protein Diets”. Semina: Ciências Agrárias, vol. 38, no. 5, Oct. 2017, pp. 3283-94, doi:10.5433/1679-0359.2017v38n5p3283.