Biesmeijer, J. C., E. J. Slaa, M. S. de Castro, B. F. Viana, A. de M. P. Kleinert, y V. L. Imperatriz-Fonseca. «Connectance of Brazilian Social Bee: Food Plant Networks Is Influenced by Habitat, But Not by Latitude, Altitude or Network Size». Biota Neotropica, vol. 5, n.º 1, enero de 2005, //www.biotaneotropica.org.br/BN/article/view/100.