Reis, G. L.; Lana, Â. M. Q. O.; Maurício, R. R. M.; Lana, R. M. Q. O.; Machado, R. M.; Borges, I.; Neto, T. Q. (2009). "Influence of trees on soil nutrient pools in a silvopastoral system in the Brazilian Savannah". Plant and Soil. 329 (1–2): 185–193. doi:10.1007/s11104-009-0144-5. S2CID2049394.
Reis, G. L.; Lana, Â. M. Q. O.; Maurício, R. R. M.; Lana, R. M. Q. O.; Machado, R. M.; Borges, I.; Neto, T. Q. (2009). "Influence of trees on soil nutrient pools in a silvopastoral system in the Brazilian Savannah". Plant and Soil. 329 (1–2): 185–193. doi:10.1007/s11104-009-0144-5. S2CID2049394.