Butler, Richard J.; and Galton, Peter M. The 'dermal armour' of the ornithopod dinosaur Hypsilophodon from the Wealden (Early Cretaceous: Barremian) of the Isle of Wight: a reappraisal. Cretaceous Research. 2008, 29 (4): 636–642. doi:10.1016/j.cretres.2008.02.002.引文使用过时参数coauthors (帮助)
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Richard J. Butler, Jin Liyong, Chen Jun, Pascal Godefroit. The postcranial osteology and phylogenetic position of the small ornithischian dinosaur Changchunsaurus parvus from the Quantou Formation (Cretaceous: Aptian–Cenomanian) of Jilin Province, north-eastern China. Palaeontology. 2011, 54 (3): 667–683. doi:10.1111/j.1475-4983.2011.01046.x.
Holtz, Thomas R. Jr. (2012) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,Winter 2011 Appendix. (页面存档备份,存于互联网档案馆)
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Holtz, Thomas R. Jr. (2012) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,Winter 2011 Appendix. (页面存档备份,存于互联网档案馆)