Lindgren, Johan; Peter Sjövall; Ryan M. Carney; Per Uvdal; Johan A. Gren; Gareth Dyke; Bo Pagh Schultz; Matthew D. Shawkey; Kenneth R. Barnes (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.
Lindgren, Johan; Peter Sjövall; Ryan M. Carney; Per Uvdal; Johan A. Gren; Gareth Dyke; Bo Pagh Schultz; Matthew D. Shawkey; Kenneth R. Barnes (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.
Lindgren, Johan; Peter Sjövall; Ryan M. Carney; Per Uvdal; Johan A. Gren; Gareth Dyke; Bo Pagh Schultz; Matthew D. Shawkey; Kenneth R. Barnes (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.