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.
Waddell V. G., Milinkovitch M. C., Berube M., Stanhope M. J. 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.
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.
Waddell V. G., Milinkovitch M. C., Berube M., Stanhope M. J. 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.