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), 247–260. https://doi.org/10.11646/zootaxa.4216.3.3