S. Mateus, A. C. R. Andrade e Silva, and C. A. Garófalo, “Diversity and Temporal Variation in the Orchid Bee Community (Hymenoptera: Apidae) of a Remnant of a Neotropical Seasonal Semi-deciduous Forest”, Sociobiology, vol. 62, no. 4, pp. 571–577, Dec. 2015.