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Marks, B.D.; Weckstein, J.D.; Moyle, R.G. (2007). «Molecular phylogenetics of the bee-eaters (Aves: Meropidae) based on nuclear and mitochondrial DNA sequence data». Molecular Phylogenetics and Evolution45 (1): 23-32. doi:10.1016/j.ympev.2007.07.004. PMID17716922.