BENSCH, S., HELBIG, A.J., SALOMON, M., & SEIBOLD, I. 2002. Amplified fragment length polymorphism analysis identifies hybrids between two subspecies of warblers. Molecular Biology 11: 473-481.

BUTURLIN, S.A. & DEMENTIEV, G.P. 1937. [A complete key to the Birds of the USSR. vo. 4. Passeriformes.] Moscow-Leningrad. (In Russian.)

CLEMENT, P., HELBIG A.J & SMALL, B. 1998. Taxonomy and identification of chiffchaffs in the Western Palearctic. Brit. Birds 91: 361-376.

COLLINSON, J.M., SHANNON, T., ARCHER, P., ODIN, N., RIDDINGTON, R. & WALSH, P. 2013. Genetic analysis of migrant Siberian Chiffchaff in Britain and Ireland. Brit. Birds 106: 109-113.

CONWAY, G. 2005. Population composition of wintering Common Chiffchaffs in southern England. Brit. Birds 98: 427-428.

COPETE. J. L. & LÓPEZ, F. 2013. Identificatiön de subespecies en el mosquitero comün (Phylloscopus collybita collybita, P. c. abietinus, P. c. tristis, P. c. brevirostris, P. c. caucasicus y P. c. menzbieri). In: Rodríguez. N., Garcia, J. & Copete J. L. (eds). 2013. El mosquitero ibérico. Grupo Iberico de Anillamiento. Léon.

CRAMP, S. (ed.) 1992. The Birds of the Western Palearctic. Vol. 6. Oxford.

DEAN, A. 2013. How many Siberian Chifchaffs are reaching Britain? Brit. Birds 106: 282-283.

DEAN, A. 2018. Genetic studies of  'Siberian Chiffchaff'. Brit. Birds 111: 546 - 548.

—  , Bradshaw, C., Martin, J., Stoddart, A. & Walbridge, G. 2010. The status in Britain of 'Siberian Chiffchaff'. Brit. Birds 103: 320-338.

DEAN, A.R. 1985. Review of British status and identification of Greenish Warbler. Brit. Birds 78: 437-451.

—  2007. Enigmatic ‘grey-and-white’ Common Chiffchaffs. Brit. Birds 100: 497-499.

— & Svensson, L. 2005. Siberian Chiffchaff revisited. Brit. Birds 98: 396-410.

de KNIJFF, P., van der SPEK, V. & FISHER, J. 2012. Genetic identity of grey chiffchaffs trapped in the Netherlands in autumns of 2009 - 2011. Dutch Birding 34: 386-392.

DUBOIS, P.J. & DUQUET, M. 2008. Further thoughts on Siberian Chiffchaffs. Brit. Birds 101: 149-150.

FLOOD, R.L., HUDSON, N. & THOMAS, R. 2007. Essential Guide to the Birds of the Isles of Scilly. Privately published. Isles of Scilly.

HARRISON, R. G. & LARSON, E. L. Hybridization, Introgression, and the Nature of Species Boundaries. J Hered 2014; 105: 795-809.

HELBIG, A.J., MARTENS, J., SEIBOLD, I., HENNING, F., SCHOTTLER, B. & WINK, M. 1996. Phylogeny and species limits in the Palearctic Chiffchaff Phylloscopus collybita complex: mitochondrial genetic differentiation and bioacoustic evidence. Ibis 138: 650-666.

IVANISTKII, V., ILINA, I. & MAROVA, I. 2020. The sounds between the strophes: different chiffchaff taxa perform different tret calls in their song. Bioacoustics DOI: 10.1080/09524622.2020.1796788.

JÄNNES, H. 2002. Calls of Eastern Vagrants (cd and booklet). Helsinki.

LINDHOLM, A. 2008. Mixed song of Chiffchaffs in Northern Russia. Alula 14: 108-115.

MAROVA, I.M. & ALEKSEEV, V.N. 2008. [The population structure and distribution of vocal dialects of the Chiffchaff (Phylloscopus collybita) in the southern Ural Mountains.] Publications of the South Ural State Reserve. Release 1. (In Russian)

—, FEDEROV,V.V., SHIPILINA, D.A., & ALEKSEEV, V. N. 2009. Genetic and vocal differentiation in hybrid zones of birds: Siberian and European Chiffchaffs (Phylloscopus [collybita] tristis and Ph. c. abietinus) in the Southern Urals. Doklady Biological Sciences 427: 384–386.

—    & LEONOVICH, V.V. 1993. [Hybridization of Siberian and European Chiffchaffs in the zone of sympatry.] Proc. Zool. Mus. Moscow University 30: 147-164. (In Russian)

—, SHIPILINA, D. A., FEDEROV, V. V. & IVANITSKII, V. V. 2013.  Siberian and East European chiffchaffs: geographical distribution, morphological features, vocalization, phenomenon of mixed singing, and evidences of hybridization in sympatry zone. In: Rodríguez. N., Garcia, J. & Copete J. L. (eds). 2013. El mosquitero ibérico. Grupo Iberico de Anillamiento. Léon.

—, SHIPILINA, D., FEDEROV, V., ALEKSEEV, V. & IVANITSKII, V. 2017. Interaction between Common and Siberian Chiffchaff in a contact zone. Ornis Fennica 94: 66–81.

      —,  ILLYINA, I., KVARTALNOV, P., GRABOVSKY, V., BELOKON, M., SOLOVYOVA, E. & IVANITSKII, V. 2021. From the Bosporus to Kopet Dagh: Morphological, Genetic and BioacousticVariation in the Chiffchaff in Turkey, the Caucasus and Western Turkmenistan. Ardea 109: 1 - 16.

MARTENS, J. & MEINCKE, C. 1989. [The Siberian Chiffchaff Phylloscopus collybita tristis: Song and Reaction of a central European Population in field tests.] J. Orn. 130: 455–473. (In German)

MILLINGTON, R. 2006. Identification of a Siberian Chiffchaff in Norfolk. Birding World 19: 14-16.

MOTTEAU, V., CAMPBELL, O., SENFELD, T., SHANNON, T.J., COLLINSON, J.M. & LLOYD, S. 2022.  Occurrence of Common Chiffchaff Phylloscopus collybita subspecies menzbieri in the United Arab Emirates confirmed by genetic analysis. Brit. Birds 115: 500 - 509.

NOESKE, A. & DEAN, A.R. 2006. 'Siberian Chiffchaff' in Europe: photo forum. Publications / Articles, www.club300.de.

PENNINGTON, M., OSBORN, K., HARVEY, P., RIDDINGTON, R., OKILL, D., ELLIS, P. & HEUBECK, M. 2004. The Birds of Scotland. Christopher Helm. London.

RAKOVIĆ, M., NETO, J.M., LOPES, R.J., KOBLIK, E.A., FADEEV, I.V., LOHMAN, Y.V., AGHAYAN, S.A., BOANO, G., PAVIA, M., PERLMAN, Y., KIAT, Y., BEN DOV, A., COLLINSON, J.M., VOELKER, G. & DROVETSKI, S.V. 2019. Geographic patterns of mtDNA and Z-linked sequence variation in the Common Chiffchaff and the 'chiffchaff complex'. PLoS ONE 14(1): e0210268. (https://doi.org/10.1371/journal.pone.0210268)

ROSELAAR, C.S. & SHIRIHAI, H. in prep. Handbook of geographical variation and distribution of Palearctic birds.

SALOMON, M., BRIED, A.J., HELBIG, A.J., & RIOFRIO, J. 1997. Morphometric differentiation between male Common Chiffchaffs Phylloscopus [c.] collybita Vieillot, 1817, and Iberian Chiffchaffs P. [c.] brehmii Homeyer, 1871, in a secondary contact zone (Aves: Syllviidae). Zool. Anzeiger 236: 25–36.

SEVERTZOV, N.A. 1873. [Vertical and Horizontal Distribution of Turkestan Wildlife]. Turkestan. (In Russian)

SHIPILINA, D., SERBYN, M., IVANITSKII, V., MAROVA, I. &  BACKSTRÖM, N. 2017. Patterns of genetic, phenotypic, and acoustic variation across a chiffchaff (Phylloscopus collybita abietinus/tristis) hybrid zone. Ecology and Evolution 2017; 1–12.

SHIRIHAI, H. & SVENSSON, L. 2018. Handbook of Western Palearctic Birds: Passerines. vol. 1. London.

SNIGIREWSKI, S. 1931. [On range expansion of birds in the southern Ural-Mountains and new subspecies for this region.] J. Ornithol. 79: 57-66. (In German)

SUSHKIN, P.P. 1925. [List and distribution of birds of the Russian Altai and nearest parts of NW Mongolia, with a description of new or little-known forms.] Leningrad. (In Russian)

SVENSSON, L. 1992. Identification Guide to European Passerines. Fourth edn. Stockholm.

TALLA, V., KALSOOM, F., SHIPILINA, D., MAROVA, I. & BACKSTRÖM, N. 2017. Heterogeneous Patterns of Genetic Diversity and Differentiation in European and Siberian Chiffchaff (Phylloscopus collybita abietinus / P. tristis). G3 (Bethesda, Md.). 7. 10.1534/g3.117.300152.

TICEHURST, C. 1938. A Systematic Review of the Genus Phylloscopus (Willow-warblers or Leaf-warblers). London. 

VAN DEN BERG, A., & THE SOUND APPROACH. 2009. Calls, identification and taxonomy of Siberian Chiffchaff: an analysis. Dutch Birding 31: 79–85.

VAN DER SPEK, V. & DE KNIJFF, P. 2021. Migrating Chiffchaff taxa in The Netherlands:  a ten-year genetic study. Dutch Birding 43: 120 - 131.

VAURIE. C. 1954. Systematic notes on palearctic birds. No. 9. Sylviinae: the genus Phylloscopus. Amer. Nov. Mus. no. 1685

WERNHAM, C.V., TOMS, M.P., MARCHANT J.H., CLARK, J.A., SIRIWARDENA, G.M. & BAILLIE, S.R. (eds). 2002. The Migration Atlas: movements of the birds of Britain and Ireland. London.

WHITE, S. & KEHOE, C. 2021. Report on scarce migrant birds in Britain in 2019. Brit. Birds 114: 443 – 464.

WILLIAMSON, K.1962. Identification for Ringers. No. 2. The Genus Phylloscopus. British Trust for Ornithology.

WU, C-I. 2001. The genic view of the process of speciation. J. Evol. Biol. 14: 851 - 865.