<ref name="Gösswald_&_Schirmer_1965">{{cite journal |first1=K. |last1=Gösswald |first2=G. |last2=Schirmer |year=1965 |title=Zur geographischen Verbreitung der hügelbauenden ''Formica''-Arten |url=https://antcat.org/documents/1574/13195.pdf |journal=Collana Verde |publisher= |volume=16 |issue= |pages=133–144 |doi= }}</ref>