<ref name="Hall_&_Smith_1952">{{cite journal |first1=D. W. |last1=Hall |first2=I. C. |last2=Smith |year=1952 |title=Studies in Pharaoh's ant, ''Monomorium'' ''pharaonis'' (L.). (7) Thoracic structures, typical and atypical |url= |journal=Entomologist's Monthly Magazine |publisher= |volume=88 |issue= |pages=97–102 |doi= }}</ref>