Frings, Hubert; Frings, Mable (1957). «The effects of temperature on chirp-rate of male cone-headed grasshoppers, Neoconocephalus ensiger». Journal of Experimental Zoology. 134 (3): 411–425. PMID13475653. doi:10.1002/jez.1401340302
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. 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. 134 (3): 411–425. PMID13475653. doi:10.1002/jez.1401340302
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