Carneiro, L. da S., W. M. Aguiar, C. M. L. Aguiar, and G. M. de M. Santos. “Orchid Bees (Hymenoptera: Apidae: Euglossini) in Seasonally Dry Tropical Forest (Caatinga) in Brazil”. Sociobiology, vol. 65, no. 2, July 2018, pp. 253-8, doi:10.13102/sociobiology.v65i2.2077.