Bellaver, Claudio, et al. “Effects of Feeding Poultry Beds on the Performance, Digestibility and Economics in Finishing Pigs”. Pesquisa Agropecuaria Brasileira, vol. 18, no. 7, Apr. 2014, pp. 797-04, doi:10.1590/S1678-3921.pab1983.v18.15370.