la Salle, J., G. Arakelian, R. W. Garrison, and M. W. Gates. “A New Species of Invasive Gall Wasp (Hymenoptera: Eulophidae: Tetrastichinae) on Blue Gum (Eucalyptus globulus) in California”. Zootaxa, vol. 2121, no. 1, May 2009, pp. 35–43, doi:10.11646/zootaxa.2121.1.4.