<ref name="Forel_1910">{{cite book |first1=A. |last1=Forel |year=1910 |title=Das Sinnesleben der Insekten |url=https://antcat.org/documents/8363/dassinneslebende01fore.pdf |location=München |publisher=Ernst Reinhardt |pages=xv + 393 pp. |isbn=}}</ref>