Steven L. Wick and Thomas M. Lehman (2013). «A new ceratopsian dinosaur from the Javelina Formation (Maastrichtian) of West Texas and implications for chasmosaurine phylogeny». Naturwissenschaften100 (7): 667-682. doi:10.1007/s00114-013-1063-0.
Longrich, N. R. (2014). «The horned dinosaurs Pentaceratops and Kosmoceratops from the upper Campanian of Alberta and implications for dinosaur biogeography». Cretaceous Research51: 292-308. doi:10.1016/j.cretres.2014.06.011.
