Gomes, Jacinta Diva Ferrugem, et al. “Effects of Increasing Dietary Fiber on Digestibility, Performance and Carcass Characteristics: I. Growing and Finishing Gilts”. Semina: Ciências Agrárias, vol. 28, no. 3, Aug. 2007, pp. 483-92, doi:10.5433/1679-0359.2007v28n3p483.