<ref name="Baroni_Urbani_et_al_1992">{{cite journal |first1=C. |last1=Baroni Urbani |first2=B. |last2=Bolton |first3=P. S. |last3=Ward |year=1992 |title=The internal phylogeny of ants (Hymenoptera: Formicidae) |url=https://antcat.org/documents/177/6336.pdf |journal=Systematic Entomology |publisher= |volume=17 |issue= |pages=301–329 |doi= }}</ref>