Paiva, É. A. S. e, Morais, H. C. de, Isaias, R. M. dos S., Rocha, D. M. S. da, & Oliveira, P. E. (2001). Occurrence and structure of extrafloral nectaries in Pterodon pubescens Benth. and Pterodon polygalaeflorus Benth. Pesquisa Agropecuaria Brasileira, 36(2), 219-224. https://doi.org/10.1590/S1678-3921.pab2001.v36.6130