Lindgren, Johan; Peter Sjövall; Ryan M. Carney; Per Uvdal; Johan A. Gren; Gareth Dyke; Bo Pagh Schultz; Matthew D. Shawkey; Kenneth R. Barnes; Michael J. Polcyn (February 2014). "Skin pigmentation provides evidence of convergent melanism in extinct marine reptiles". Nature. 506 (7489): 484–488. Bibcode:2014Natur.506..484L. doi:10.1038/nature12899. PMID24402224. S2CID4468035.
Lindgren, Johan; Peter Sjövall; Ryan M. Carney; Per Uvdal; Johan A. Gren; Gareth Dyke; Bo Pagh Schultz; Matthew D. Shawkey; Kenneth R. Barnes; Michael J. Polcyn (February 2014). "Skin pigmentation provides evidence of convergent melanism in extinct marine reptiles". Nature. 506 (7489): 484–488. Bibcode:2014Natur.506..484L. doi:10.1038/nature12899. PMID24402224. S2CID4468035.
Lindgren, Johan; Peter Sjövall; Ryan M. Carney; Per Uvdal; Johan A. Gren; Gareth Dyke; Bo Pagh Schultz; Matthew D. Shawkey; Kenneth R. Barnes; Michael J. Polcyn (February 2014). "Skin pigmentation provides evidence of convergent melanism in extinct marine reptiles". Nature. 506 (7489): 484–488. Bibcode:2014Natur.506..484L. doi:10.1038/nature12899. PMID24402224. S2CID4468035.
Lindgren, Johan; Peter Sjövall; Ryan M. Carney; Per Uvdal; Johan A. Gren; Gareth Dyke; Bo Pagh Schultz; Matthew D. Shawkey; Kenneth R. Barnes; Michael J. Polcyn (February 2014). "Skin pigmentation provides evidence of convergent melanism in extinct marine reptiles". Nature. 506 (7489): 484–488. Bibcode:2014Natur.506..484L. doi:10.1038/nature12899. PMID24402224. S2CID4468035.