<ref name="Collingwood_1999">{{cite journal |first1=C. A. |last1=Collingwood |year=1999 |title=Changes in the ant (Hym.: Formicidae) fauna of a Swedish bogland area 1986-1997 |url= |journal=Entomologist's Record and Journal of Variation |publisher= |volume=111 |issue= |pages=233–234 |doi= }}</ref>