<ref name="Ross_&_Keller_1998">{{cite journal |first1=K. G. |last1=Ross |first2=L. |last2=Keller |year=1998 |title=Genetic control of social organization in an ant |url= |journal=Proceedings of the National Academy of Sciences of the United States of America |publisher= |volume=95 |issue= |pages=14232–14237 |doi= }}</ref>