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(en) dos Reis M, Inoue J, Hasegawa M, Asher R, Donoghue C. Yang Z. (2012). Phylogenomic datasets provide both precision and accuracy in estimating the timescale of placental mammal phylogeny. Proceedings of the Royal Society B279 (1742): 3491–3500. PMID22628470. DOI: 10.1098/rspb.2012.0683.