Journal article
A revision of the late Campanian centrosaurine ceratopsid genus Styracosaurus from the Western Interior of North America
Citation
Ryan, M. J.; Holmes, R. B.; Russell, A. P. (2007). A revision of the late Campanian centrosaurine ceratopsid genus Styracosaurus from the Western Interior of North America. Journal of Vertebrate Paleontology 27(4): 944-962. doi:10.1671/0272-4634(2007)27[944:AROTLC]2.0.CO;2