O. T. Silveira, “ Surveying neotropical social wasps: an evaluation of methods in the ‘Ferreira Penna’ research station (ECFPn), in Caxiuanã, PA, Brazil (Hym., Vespidae, Polistinae) ”, Pap. Avulsos Zool., vol. 42, no. 12, pp. 299–323, Nov. 2002, doi: 10.1590/S0031-10492002001200001.