<ref name="Vander_Meer_&_Lofgren_1989">{{cite journal |first1=R. K. |last1=Vander Meer |first2=C. S. |last2=Lofgren |year=1989 |title=Biochemical and behavioral evidence for hybridization between fire ants, ''Solenopsis'' ''invicta'' and ''Solenopsis'' ''richteri'' (Hymenoptera: Formicidae) |url= |journal=Journal of Chemical Ecology |publisher= |volume=15 |issue= |pages=1757–1765 |doi= }}</ref>