Prieto-Márquez, A. (2011) “Revised diagnoses of Hadrosaurus foulkii Leidy, 1858 (the type genus and species of Hadrosauridae Cope, 1869) and Claosaurus agilis Marsh, 1872 (Dinosauria: Ornithopoda) from the Late Cretaceous of North America”, Zootaxa. Auckland, New Zealand, 2765(1), pp. 61–68. doi: 10.11646/zootaxa.2765.1.6.