Wyatt DR, Cade WH. Factors Affecting Calling Behaviour in Field Crickets, Teleogryllus and Gryllus (Age, Weight, Density, and Parasites).  1984. Available at: https://brill.com/view/journals/beh/88/1-2/article-p61_5.xmlhttps://brill.com/downloadpdf/journals/beh/88/1-2/article-p61_5.xml.