Prieto-Márquez, Albert. “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 2765, no. 1 (February 15, 2011): 61–68. Accessed May 1, 2025. https://www.mapress.com/zt/article/view/zootaxa.2765.1.6.