Silveira, O.T. (2002) “Surveying neotropical social wasps. An evaluation of methods in the ‘Ferreira Penna’ research station (ECFPn), in Caxiuanã, PA, Brazil (Hym, Vespidae, Polistinae)”, Papéis Avulsos de Zoologia, 42, pp. 299–323. doi:10.11606/0031-1049.2002.42.p299-323.