da Silva, C. I.; Gomes Bordon, N.; da Rocha Filho, L. C.; Garófalo, C. A. The Importance of Plant Diversity in Maintaining the Pollinator Bee, Eulaema Nigrita (Hymenoptera: Apidae) in Sweet Passion Fruit Fields. Rev. Biol. Trop. 2012, 60, 1553–1565.