<ref name="Jaffe_1984">{{cite journal |first1=K. |last1=Jaffe |year=1984 |title=Negentropy and the evolution of chemical recruitment in ants |url=https://antcat.org/documents/1702/4772.pdf |journal=Journal of Theoretical Biology |publisher= |volume=106 |issue= |pages=587–604 |doi= }}</ref>