Santos, Vivian Maia dos, et al. “Digestibility, Performance and Morphophysiological Characteristics of the Digestive Tract of Weaned Piglets under Diets With Mannanoligosaccharides”. Pesquisa Agropecuaria Brasileira, vol. 45, no. 1, Dec. 2010, pp. 99-105, doi:10.1590/S1678-3921.pab2010.v45.2857.