M. de A. Botrel, J. R. Pereira, and D. F. Xavier, “Evaluation or forage legumes of thee genera Centrosema, Galactia and Zornia in acid low fertility soils”, PAB, vol. 20, no. 5, pp. 585–590, Apr. 2014, doi: 10.1590/S1678-3921.pab1985.v20.15660.