Guimarães Filho, C., & Soares, J. G. G. (1999). A physical model evaluation of a caatinga/buffel grass/leucaena integrated system for cattle production in the semi-arid region. I. Cow-calf operation. Pesquisa Agropecuaria Brasileira, 34(9), 1721–1727. https://doi.org/10.1590/S1678-3921.pab1999.v34.5421