<ref name="Forel_1904">{{cite journal |first1=A. |last1=Forel |year=1904 |title=Ants and some other insects. An inquiry into the psychic powers of these animals with an appendix on the peculiarities of their olfactory sense. [concl.] [Translated by W. M. Wheeler.] |url= |journal=Monist |publisher= |volume=14 |issue= |pages=177–193 |doi= }}</ref>