[1]
J. M. Carpenter, S. R. Andena, F. B. Noll, and J. W. Wenzel, “Well, what about intraspecific variation? Taxonomic and phylogenetic characters in the genus Synoeca de Saussure (Hymenoptera, Vespidae)”, Zootaxa, vol. 3682, no. 3, pp. 421–431, Jun. 2013.