C. I. da Silva, N. Gomes Bordon, L. C. da Rocha Filho, and C. A. Garófalo, “The importance of plant diversity in maintaining the pollinator bee, Eulaema nigrita (Hymenoptera: Apidae) in sweet passion fruit fields”, Rev. Biol. Trop., vol. 60, no. 4, pp. 1553–1565, Dec. 2012.