BILLEN, J.; PLANCKEN, L. V. Exocrine glands in the legs of the stingless bee Frieseomelitta varia (Lepeletier) (Apidae: Meliponini). Sociobiology, Feira de Santana, Brazil, v. 61, n. 4, p. 386–392, 2014. DOI: 10.13102/sociobiology.v61i4.386-392. Disponível em: https://periodicos.uefs.br/index.php/sociobiology/article/view/646. Acesso em: 5 jul. 2026.