Frings, Hubert; Frings, Mable (1957). "The effects of temperature on chirp-rate of male cone-headed grasshoppers, Neoconocephalus ensiger". Journal of Experimental Zoology (англ.). 134 (3): 411–425. doi:10.1002/jez.1401340302. PMID13475653.
Frings, Hubert; Frings, Mable (1962). "Effects of temperature on the ordinary song of the common meadow grasshopper, Orchelimum vulgare (Orthoptera: Tettigoniidae)". Journal of Experimental Zoology (англ.). 151 (1): 33–51. doi:10.1002/jez.1401510104.
Frings, Hubert; Frings, Mable (1957). "The effects of temperature on chirp-rate of male cone-headed grasshoppers, Neoconocephalus ensiger". Journal of Experimental Zoology (англ.). 134 (3): 411–425. doi:10.1002/jez.1401340302. PMID13475653.