Santos, C.A.F., Rodrigues, M.A. and Zucchi, M.I. (2008) “Genetic variability of umbu trees in Brazilian Semi-Arid region, based on AFLP markers”, Pesquisa Agropecuaria Brasileira, 43(8), pp. 1037–1043. doi:10.1590/S1678-3921.pab2008.v43.234.