Michael J. Ryan, David C. Evans, Kieran M. Shepherd: A New Ceratopsid from the Foremost Formation (Middle Campanian) of Alberta. In: Canadian Journal of Earth Sciences, Bd. 49, Nr. 11, 2012, ISSN0008-4077, S. 1251–1262, doi:10.1139/e2012-056.
S. D. Sampson: Two new horned dinosaurs from the upper Cretaceous Two Medicine Formation of Montana; with a phylogenetic analysis of the Centrosaurinae (Ornithischia: Ceratopsidae). In: Journal of Vertebrate Paleontology, Volume 15, Issue 4, S. 743–760, 1995. (Abstract)
zdb-katalog.de
Michael J. Ryan, David C. Evans, Kieran M. Shepherd: A New Ceratopsid from the Foremost Formation (Middle Campanian) of Alberta. In: Canadian Journal of Earth Sciences, Bd. 49, Nr. 11, 2012, ISSN0008-4077, S. 1251–1262, doi:10.1139/e2012-056.