und Gerd Gaiser: Tempel Siziliens, Insel, Frankfurt 1963 Konrad Helbig und Gerhard Kleiner: Minoische Kunst Insel, Frankfurt 1964 Konrad Helbig, F. C...
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Version 11.1. International Ornithologists' Union. Retrieved 1 July 2021. Helbig, A. J. (2001): Phylogeny and biogeography of the genus Sylvia. In: Shirihai...
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T22729533A118845180.en. Retrieved 18 November 2021. Sangster, George; Knox, Alan G.; Helbig, Andreas J. & Parkin, David T. (2002): Taxonomic recommendations for European...
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Knox, Alan G.; Helbig, Andreas J. & Parkin, David T. (2002): "Taxonomic recommendations for European birds. " Ibis 144(1): 153–159. Helbig, A. J.; Martens...
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1642/0004-8038(2005)122[0121:POTPIS]2.0.CO;2. Sangster, George; Collinson, J Martin; Helbig, Andreas J; Knox, Alan G; Parkin, David T (2005). "Taxonomic recommendations...
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History of the County of Buckinghamshire. Vol. 1. p. 132. Clement, P.; Helbig, Andreas J. (1998). "Taxonomy and identification of chiffchaffs in the Western...
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(4th ed.). Eastbourne, UK: Aves Press. pp. 509–512. ISBN 978-0-9568611-2-2. Helbig (2001), Jønsson & Fjeldså (2006) Cabot & Urdiales (2005) Cabot, J.; Urdiales...
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2305/IUCN.UK.2021-3.RLTS.T22696460A206270514.en. Retrieved 11 November 2021. Helbig, A.J.; Seibold, I.; Bednarek, W.; Brüning, H.; Gaucher, P.; Ristow, D.;...
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Fuerteventura en peligro de extinción: 10-32. Las Palmas de Gran Canaria. Helbig, A. J. (2001): Phylogeny and biogeography of the genus Sylvia. In: Shirihai...
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western Palaearctic on CD-ROM. Oxford University Press. ISBN 0-19-268579-1. Helbig, A. J. (2001). Phylogeny and biogeography of the genus Sylvia, in: Shirihai...
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