Ketchum, H.F.; Benson, R.B.J. (2010). «Global interrelationships of Plesiosauria (Reptilia, Sauropterygia) and the pivotal role of taxon sampling in determining the outcome of phylogenetic analyses». Biological Reviews of the Cambridge Philosophical Society85 (2): 361-392. PMID20002391. doi:10.1111/j.1469-185X.2009.00107.x.
Ketchum, H.F.; Benson, R.B.J. (2011). «The cranial anatomy and taxonomy of Peloneustes philarchus (Sauropterygia, Pliosauridae) from the Peterborough Member (Callovian, Middle Jurassic) of the UK». Palaeontology54 (3): 639-665. doi:10.1111/j.1475-4983.2011.01050.x.
Hilary F. Ketchum and Roger B. J. Benson (2011). «A new pliosaurid (Sauropterygia, Plesiosauria) from the Oxford Clay Formation (Middle Jurassic, Callovian) of England: evidence for a gracile, longirostrine grade of Early-Middle Jurassic pliosaurids». Special Papers in Palaeontology86: 109-129. doi:10.1111/j.1475-4983.2011.01083.x.
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Ketchum, H.F.; Benson, R.B.J. (2010). «Global interrelationships of Plesiosauria (Reptilia, Sauropterygia) and the pivotal role of taxon sampling in determining the outcome of phylogenetic analyses». Biological Reviews of the Cambridge Philosophical Society85 (2): 361-392. PMID20002391. doi:10.1111/j.1469-185X.2009.00107.x.
