Cavalcante Salviano, Luiz Mauricio, and Dorinha Miariam Silber Schmidt Vitti. “Influence of Limestone Levels on Apparent Digestibility of Roughage-Based Diet, by Sheep”. Pesquisa Agropecuaria Brasileira, vol. 33, no. 12, Dec. 1998, pp. 2037-42, doi:10.1590/S1678-3921.pab1998.v33.5025.