<ref name="Wheeler_1915">{{cite journal |first1=W. M. |last1=Wheeler |year=1915 |title=The ants of the Baltic Amber |url=https://antcat.org/documents/3494/3323.pdf |journal=Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg |publisher= |volume=55 |issue= |pages=1–142 |doi= }}</ref>