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nih.gov
pubmed.ncbi.nlm.nih.gov
Klicka, J.; Burns, K.; Spellman, G. M. (2007). "Defining a monophyletic Cardinalini: A molecular perspective". Molecular Phylogenetics and Evolution. 45 (3): 1014–1032. doi:10.1016/j.ympev.2007.07.006. PMID17920298.
