1. Airapet'yants ES, Konstantinov AI (1973) Echolocation in animals. Israel Program of Scientific Translations, Jerusalem
2. Aldridge HDJN (1985) On the relationships between flight performance, morphology and ecology in British bats. PhD thesis, University of Bristol
3. Altes RA, Titlebaum EL (1970) Bat signals as optimally Doppler tolerant waveforms. J Acoust Soc Am 48:1014?1020
4. Blackmore M (1964) Order Chiroptera In: Southern HN (ed) The handbook of British mammals. Blackwell Scientific Publications, Oxford, pp 224?249
5. Griffin DR (1958) Listening in the dark. Yale University Press, New Haven