Guglielmino, A., and C. Bückle. “Northern Apennines As Centre of Speciation: a New Verdanus species Group (Hemiptera, Cicadomorpha, Cicadellidae) from Italy and Its Phylogenetic Relationships With V. Bensoni and the V. Limbatellus Group”. Zootaxa, vol. 2264, no. 1, Oct. 2009, pp. 1–22, doi:10.11646/zootaxa.2264.1.1.