Antonini, Y., R. A. Silveira, M. Oliveira, C. Martins, and R. Oliveira. “Orchid Bee Fauna Responds to Habitat Complexity on a Savanna Area (Cerrado) in Brazil”. Sociobiology, vol. 63, no. 2, July 2016, pp. 819-25, doi:10.13102/sociobiology.v63i2.1038.