<ref name="Jaffe_&_Perez_1989">{{cite journal |first1=K. |last1=Jaffe |first2=E. |last2=Perez |year=1989 |title=Comparative study of brain morphology in ants |url= |journal=Brain, Behavior and Evolution |publisher= |volume=33 |issue= |pages=25–33 |doi= }}</ref>