Bell, A.; Chiappe, L. M. (2015). "A species-level phylogeny of the Cretaceous Hesperornithiformes (Aves: Ornithuromorpha): Implications for body size evolution amongst the earliest diving birds". Journal of Systematic Palaeontology. 14 (3): 239–251. doi:10.1080/14772019.2015.1036141. S2CID83686657.
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Bell, A.; Chiappe, L. M. (2015). "A species-level phylogeny of the Cretaceous Hesperornithiformes (Aves: Ornithuromorpha): Implications for body size evolution amongst the earliest diving birds". Journal of Systematic Palaeontology. 14 (3): 239–251. doi:10.1080/14772019.2015.1036141. S2CID83686657.