Carvalho, Paulo Levi Oliveira, et al. “Effect of Including Different Levels of Crude Glycerin in Feed on Plasma Triglyceride Concentrations in Pigs, and the Composition and Qualitative Attributes of Pork”. Semina: Ciências Agrárias, vol. 40, no. 2, Apr. 2019, pp. 919-34, doi:10.5433/1679-0359.2019v40n2p919.