<ref name="Collingwood_1978">{{cite journal |first1=C. A. |last1=Collingwood |year=1978 |title=A provisional list of Iberian Formicidae with a key to the worker caste (Hym. Aculeata) |url=https://antcat.org/documents/719/6174.pdf |journal=EOS. Revista Española de Entomología |publisher= |volume=52 |issue= |pages=65–95 |doi= }}</ref>