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nrm.se
D. Zuccon, R. Prŷs-Jones, P.Rasmussen und P. Ericson: The phylogenetic relationships and generis Limits of finches (Fringillidae). In: Molecular Phylogenetics and Evolution. Band62, Nr.2, Februar 2012, S.581–596, doi:10.1016/j.ympev.2011.10.002 (nrm.se [PDF]).