Viana, Blandina Felipe, and Astrid de Matos Peixoto Kleinert. “A Community of Flower-Visiting Bees (Hymenoptera: Apoidea) in the Coastal Sand Dunes of Northeastern Brazil”. Biota Neotropica, vol. 5, no. 2, Jan. 2005, https://www.biotaneotropica.org.br/BN/article/view/146.