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The evolutionary history of polycotylid plesiosaurians.
Fischer V, Benson RBJ, Druckenmiller PS, Ketchum HF, Bardet N. Fischer V, et al. Among authors: ketchum hf. R Soc Open Sci. 2018 Mar 28;5(3):172177. doi: 10.1098/rsos.172177. eCollection 2018 Mar. R Soc Open Sci. 2018. PMID: 29657811 Free PMC article.
A giant pliosaurid skull from the late Jurassic of England.
Benson RB, Evans M, Smith AS, Sassoon J, Moore-Faye S, Ketchum HF, Forrest R. Benson RB, et al. Among authors: ketchum hf. PLoS One. 2013 May 31;8(5):e65989. doi: 10.1371/journal.pone.0065989. Print 2013. PLoS One. 2013. PMID: 23741520 Free PMC article.