Longrich, N. R. (2014). "The horned dinosaurs Pentaceratops and Kosmoceratops from the upper Campanian of Alberta and implications for dinosaur biogeography". Cretaceous Research.51: 292. doi:10.1016/j.cretres.2014.06.011
Archivovaná kopie. dickinsonmuseumcenter.com [online]. [cit. 2020-06-05]. Dostupné v archivu pořízeném z originálu dne 2021-09-19.
wiley.com
onlinelibrary.wiley.com
Roger B. J. Benson, Gene Hunt, Matthew T. Carrano & Nicolás Campione (2017). Cope's rule and the adaptive landscape of dinosaur body size evolution. Palaeontology. doi: 10.1111/pala.12329 http://onlinelibrary.wiley.com/doi/10.1111/pala.12329/full