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nih.gov
pubmed.ncbi.nlm.nih.gov
Pitra, C.; Fickel, J.; Meijaard, E.; Groves, C.P. (2004). "Evolution and phylogeny of old world deer". Molecular Phylogenetics and Evolution. 33 (3): 880–895. doi:10.1016/j.ympev.2004.07.013. PMID15522810.