Zwick, P. (1984) „Die Identität von Ptychoptera paludosa coerulea Strobl, 1898 (Diptera: Ptychopteridae)“., Beiträge zur Entomologie = Contributions to Entomology, 34(1), S. 97–98. doi: 10.21248/contrib.entomol.34.1.97-98.