Ludoški, J., L. Francuski, A. Vujić, and V. Milankov. “The Cheilosia canicularis Group (Diptera: Syrphidae): Species Delimitation and Evolutionary Relationships Based on Wing Geometric Morphometrics”. Zootaxa, vol. 1825, no. 1, July 2008, pp. 40–50, doi:10.11646/zootaxa.1825.1.4.