(en) M Spaulding et O'Leary MA, Gatesy J, « Relationships of Cetacea (Artiodactyla) Among Mammals: Increased Taxon Sampling Alters Interpretations of Key Fossils and Character Evolution », PLoS ONE, vol. 4, , e7062 (PMID19774069, PMCID2740860, DOI10.1371/journal.pone.0007062, lire en ligne)
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(en) M Spaulding et O'Leary MA, Gatesy J, « Relationships of Cetacea (Artiodactyla) Among Mammals: Increased Taxon Sampling Alters Interpretations of Key Fossils and Character Evolution », PLoS ONE, vol. 4, , e7062 (PMID19774069, PMCID2740860, DOI10.1371/journal.pone.0007062, lire en ligne)
(en) M Spaulding et O'Leary MA, Gatesy J, « Relationships of Cetacea (Artiodactyla) Among Mammals: Increased Taxon Sampling Alters Interpretations of Key Fossils and Character Evolution », PLoS ONE, vol. 4, , e7062 (PMID19774069, PMCID2740860, DOI10.1371/journal.pone.0007062, lire en ligne)