<ref name="Barrett_1968">{{cite journal |first1=K. E. J. |last1=Barrett |year=1968 |title=A survey of the distribution and present status of the wood ant, ''Formica rufa'' L. (Hym., Formicidae) in England and Wales |url= |journal=Transactions of the Society for British Entomology |publisher= |volume=17 |issue= |pages=217–233 |doi= }}</ref>