Bertram SM, Fitzsimmons LP. The calling songs of male spring field crickets (Gryllus veletis) change as males age.  2011;148:1045-1065. Available at: http://dx.doi.org/10.1163/000579511x588812.

Whattam EM, Bertram SM. Effects of juvenile and adult condition on long-distance call components in the Jamaican field cricket, Gryllus assimilis. Animal Behaviour. 2011;81(1):135 - 144. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0003347210003933.