T. JONGJITVIMOL, K. BOONTAWON, W. WATTANACHAIYINGCHAROEN, and S. DEOWANISH, “Nest Dispersion of a Stingless Bee Species, Trigona collina Smith, 1857 (Apidae, Meliponinae) in a Mixed Deciduous Forest in Thailand”, Trop. Nat. His., vol. 5, no. 2, pp. 69–71, Oct. 2005.