<ref name="Anderson_2009">{{cite journal |first1=S. R. |last1=Anderson |year=2009 |title=A primitive ant brood chamber with evidence of brood care in Burmese amber (Lower Cretaceous) - implications for brood care as the facilitating factor for true eusociality and dominance of ants |url=https://antcat.org/documents/4228/Anderson_2009_Denisia.pdf |journal=Denisia |publisher= |volume=26 |issue= |pages=11–20 |doi= }}</ref>