Secretions of stingless bees: the Dufour glands of some Frieseomelitta species (Apidae, Meliponinae) Eda Flávia L.R.A. Patricio, Leopoldo Cruz López, Roland Maile and E. David MorganApidologie, 34 4 (2003) 359-365DOI: https://doi.org/10.1051/apido:2003027
