Dr David R. Ragge
Schede primarie
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. The songs of the western European grasshoppers of the genus Stenobothrus in relation to their taxonomy (Orthoptera: Acrididae) . Bulletin of the British Museum (Natural History) Entomology. 1987;55(2). Available at: https://archive.org/details/bulletinofbritis552brit.
. Acoustic Laboratory. 1980.
. A putative hybrid in nature between Chorthippus brunneus and C. biguttulus (Orthoptera : Acrididae). Systematic Entomology. 1976;1(1):71-74.