Kirchman, J.J., Witt, C.C., McGuire, J.A., Graves, G.R., 2010. DNA from a 100-year-old Holotype Confirms the Validity of a Potentially Extinct Hummingbird Species. Biology Letters 6, 112-115. doi:10.1098/rsbl.2009.0545

Cryan, J.R., Wiegmann, B.M., Deitz, L.L., Dietrich, C.H., Whiting, M.F., 2004. Treehopper Trees: Phylogeny of Membracidae (Hemiptera: Cicadomorpha: Membracoidea) Based on Molecules and Morphology. Systematic Entomology 29, 441-454. doi:10.1111/j.0307-6970.2004.00260.x