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GONZALEZ, Juan-Carlos T.; SHELDON, Ben C.; COLLAR, Nigel J. A comprehensive molecular phylogeny for the hornbills (Aves: Bucerotidae). Molecular Phylogenetics and Evolution. 2013-05-01, roč. 67, čís. 2, s. 468–483. Dostupné online [cit. 2023-11-22]. ISSN1055-7903. DOI10.1016/j.ympev.2013.02.012.
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GONZALEZ, Juan-Carlos T.; SHELDON, Ben C.; COLLAR, Nigel J. A comprehensive molecular phylogeny for the hornbills (Aves: Bucerotidae). Molecular Phylogenetics and Evolution. 2013-05-01, roč. 67, čís. 2, s. 468–483. Dostupné online [cit. 2023-11-22]. ISSN1055-7903. DOI10.1016/j.ympev.2013.02.012.
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GONZALEZ, Juan-Carlos T.; SHELDON, Ben C.; COLLAR, Nigel J. A comprehensive molecular phylogeny for the hornbills (Aves: Bucerotidae). Molecular Phylogenetics and Evolution. 2013-05-01, roč. 67, čís. 2, s. 468–483. Dostupné online [cit. 2023-11-22]. ISSN1055-7903. DOI10.1016/j.ympev.2013.02.012.