Dos Santos, J. N. A. J., Silveira, O. T., & Carpenter, J. M. (2020).

Taxonomic revision of the P. chartergoides species-group of the genus Protopolybia Ducke, 1905 (Hymenoptera: Vespidae, Polistinae)

. Zootaxa, 4858(4), 542–554. https://doi.org/10.11646/zootaxa.4858.4.4