Arnason U., Gullberg A., Gretarsdottir S., et al. The Mitochondrial Genome of the Sperm Whale and a New Molecular Reference for Estimating Eutherian Divergence Dates (англ.) // Journal of Molecular Evolution[англ.]. — 2000. — Vol. 50, iss. 6. — P. 569–578. — ISSN1432-1432. — doi:10.1007/s002390010060.
Victor G. Waddell, Michel C. Milinkovitch, Martine Berube, Michael J. Stanhope. Molecular Phylogenetic Examination of the Delphinoidea Trichotomy: Congruent Evidence from Three Nuclear Loci Indicates That Porpoises (Phocoenidae) Share a More Recent Common Ancestry with White Whales (Monodontidae) Than They Do with True Dolphins (Delphinidae) (англ.) // Molecular Phylogenetics and Evolution. — 2000. — Vol. 15, iss. 2. — P. 314–318. — ISSN1055-7903. — doi:10.1006/mpev.1999.0751.
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Китопарнокопытные(англ.) (недоступная ссылка — история). Элгеран.Таксоны. Дата обращения: 28 ноября 2020.
Arnason U., Gullberg A., Gretarsdottir S., et al. The Mitochondrial Genome of the Sperm Whale and a New Molecular Reference for Estimating Eutherian Divergence Dates (англ.) // Journal of Molecular Evolution[англ.]. — 2000. — Vol. 50, iss. 6. — P. 569–578. — ISSN1432-1432. — doi:10.1007/s002390010060.
Arnason U., Gullberg A., Gretarsdottir S., et al. The Mitochondrial Genome of the Sperm Whale and a New Molecular Reference for Estimating Eutherian Divergence Dates (англ.) // Journal of Molecular Evolution[англ.]. — 2000. — Vol. 50, iss. 6. — P. 569–578. — ISSN1432-1432. — doi:10.1007/s002390010060.
Victor G. Waddell, Michel C. Milinkovitch, Martine Berube, Michael J. Stanhope. Molecular Phylogenetic Examination of the Delphinoidea Trichotomy: Congruent Evidence from Three Nuclear Loci Indicates That Porpoises (Phocoenidae) Share a More Recent Common Ancestry with White Whales (Monodontidae) Than They Do with True Dolphins (Delphinidae) (англ.) // Molecular Phylogenetics and Evolution. — 2000. — Vol. 15, iss. 2. — P. 314–318. — ISSN1055-7903. — doi:10.1006/mpev.1999.0751.
Waddell P. J., Okada N., Hasegawa M. Towards resolving the interordinal relationships of placental mammals (англ.) // Systematic Biology. — 1999. — Vol. 48, iss. 1. — P. 1—5. — ISSN1063-5157.