Project 2220: M. F. Simon, J. F. Pastore, A. F. Souza, L. M. Borges, V. R. Scalon, P. G. Ribeiro, J. Santos-Silva, V. C. Souza, L. P. Queiroz. 2016. Molecular Phylogeny of Stryphnodendron (Mimosoideae, Leguminosae) and Generic Delimitations in the Piptadenia Group. International Journal of Plant Sciences. 177 (1):44-59.