"Peregrines at Derby Cathedral"(PDF). Derbyshire Wildlife Trust, Derby Cathedral and Derby Museum & Art Gallery. Archived from the original(PDF) on October 2, 2011. Retrieved 18 April 2011.
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Virkkala, Raimo; Luoto, Miska; Heikkinen, Risto K.; Leikola, Niko (2005). "Distribution patterns of boreal marshland birds: modelling the relationships to land cover and climate". Journal of Biogeography. 32 (11): 1957–1970. Bibcode:2005JBiog..32.1957V. doi:10.1111/j.1365-2699.2005.01326.x. S2CID86122650.
Fereidouni, S.R.; Aghakhan, M.; Werner, O.; Starick, E.; Bozorghmehrifard, M.H. (2005). "Isolation and identification of avian influenza viruses from migratory birds in Iran". Veterinary Record. 157 (17): 526. doi:10.1136/vr.157.17.526. PMID16244240. S2CID46654957.
Dronen, Norman O.; Blend, Charles K. (2007). "Ophthalmophagus bucephali n. sp. (Digenea: Cyclocoelidae) from the American Goldeneye, Bucephala clangula americana (Anatidae), from the Central Flyway of North America and a Checklist of Goldeneye Parasites". Comparative Parasitology. 74 (1): 48–74. doi:10.1654/4221.1. S2CID85945398.
"Peregrines at Derby Cathedral"(PDF). Derbyshire Wildlife Trust, Derby Cathedral and Derby Museum & Art Gallery. Archived from the original(PDF) on October 2, 2011. Retrieved 18 April 2011.