Kalmring K, Kühne R. The coding of airborne-sound and vibration signals in bimodal ventral-cord neurons of the grasshopper Tettigonia cantans. Journal of comparative physiology. 1980;139:267?275.

Kühne R, Silver S, Lewis B. Processing of vibratory and acoustic signals by ventral cord neurones in the cricket Gryllus campestris. Journal of Insect Physiology. 1984;30(7):575 - 585. Available at: http://linkinghub.elsevier.com/retrieve/pii/0022191084900866.