Moulton, J.K. 2017.

The true identity of Dixa modesta Johannsen (Diptera: Dixidae) resolved:
synonymy of Dixa similis Johannsen, designation of the Dixa ubiquita species group, and description of three new eastern Nearctic species

. Zootaxa. 4216, 3 (Jan. 2017), 247–260. DOI:https://doi.org/10.11646/zootaxa.4216.3.3.