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EXS|January 1, 1991
Experimental and analytical techniques used in bird orientation researchA J HelbigTrends in Ecology & Evolution|January 15, 2011
Are orientation mechanisms among migratory birds speciesospecific?A J HelbigPhilosophical Transactions of the Royal Society of London. Series B, Biological Sciences|November 29, 1995
Evolutionary history of New and Old World vultures inferred from nucleotide sequences of the mitochondrial cytochrome b geneI Seibold, A J HelbigMolecular Phylogenetics and Evolution|April 7, 1999
Molecular phylogeny of Palearctic-African Acrocephalus and Hippolais Warblers (Aves: Sylviidae)A J Helbig, I SeiboldMolecular Ecology|December 18, 2001
Genetic differentiation and phylogeography of gulls in the Larus cachinnans-fuscus group (Aves: Charadriiformes)D Liebers, A J Helbig, P de KnijffJournal of Evolutionary Biology|November 26, 2003
Weak phylogenetic effects on ecological niches of Sylvia warblersK Böhning-Gaese, M D Schuda, A J HelbigProceedings. Biological Sciences|February 22, 1997
Enigmatic phylogeny of skuas (Aves:Stercorariidae)B L Cohen, A J Baker, K Blechschmidt, et al.Pageof 1