Norberg, Ulla M.; Rayner, J. M. V. (1987). "Ecological morphology and flight in bats (Mammalia; Chiroptera): wing adaptations, flight performance, foraging strategy and echolocation". The Royal Society. 316 (1179): 335–427. Bibcode:1987RSPTB.316..335N. doi:10.1098/rstb.1987.0030 – via JSTOR.
Norberg, Ulla M.; Rayner, J. M. V. (1987). "Ecological morphology and flight in bats (Mammalia; Chiroptera): wing adaptations, flight performance, foraging strategy and echolocation". The Royal Society. 316 (1179): 335–427. Bibcode:1987RSPTB.316..335N. doi:10.1098/rstb.1987.0030 – via JSTOR.