Prieto-Márquez, A. “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, vol. 2765, no. 1, Feb. 2011, pp. 61–68, doi:10.11646/zootaxa.2765.1.6.