Kojima, J.-I., Saito, F. and Nguyen, L. T. P. (2011) “On the species-group taxa of Taiwanese social wasps (Hymenoptera: Vespidae) described and/or treated by J. Sonan”, Zootaxa. Auckland, New Zealand, 2920(1), pp. 42–64. doi: 10.11646/zootaxa.2920.1.2.