Forskel mellem versioner af "Kejserørn"

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fixing doi from hijacked website, see here
m (kilde indsat)
m (fixing doi from hijacked website, see here)
{{reflist | refs=
<ref name=Larsen>{{kilde nyheder | url = https://www.dr.dk/nyheder/regionale/syd/sjaelden-oern-er-spottet-i-danmark-det-er-noget-af-en-sensation | title = Sjælden ørn er spottet i Danmark: Det er noget af en sensation | publisher = DR | first = Maria | last = Larsen | first2 = Marie de Fine | last2 = Skibsted | date = {{dato|16-2-2018}} }}</ref>
<ref name=Sangster>Sangster, George; Knox, Alan G.; Helbig, Andreas J. & Parkin, David T. (2002): Taxonomic recommendations for European birds. ''[[Ibis (journal)|Ibis]]'' '''144'''(1): 153–159. {{DOI|10.1046/j.0019-1019.2001.00026.x}} [http://wwwdoi.blackwell-synergy.com/doi/pdforg/10.1046/j.0019-1019.2001.00026.x PDF fulltext]</ref>
<ref name=Cramp>Cramp, S. & Simmons, K. E. L. (1980) Birds of the Western Palearctic, Vol. 2. Oxford University Press, Oxford.</ref>
<ref name=Meyburg>Meyburg, B. U. (1994): [210 & 211: Imperial Eagles]. ''In:'' del Hoyo, Josep; Elliott, Andrew & Sargatal, Jordi (editors): ''[[Handbook of Birds of the World]], Volume 2: New World Vultures to Guineafowl'': 194-195, plate 20. Lynx Edicions, Barcelona. ISBN 84-87334-15-6</ref>
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