Ryan, Michael J.; Russell, Anthony P., and Hartman, Scott. (2010). "A New Chasmosaurine Ceratopsid from the Judith River Formation, Montana", (em inglês) In: Michael J. Ryan, Brenda J. Chinnery-Allgeier, and David A. Eberth (eds), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, Indiana University Press, 656 pp. ISBN0-253-35358-0.
doi.org
dx.doi.org
Longrich, N. R. (2013). «Judiceratops tigris, a New Horned Dinosaur from the Middle Campanian Judith River Formation of Montana». Bulletin of the Peabody Museum of Natural History. 54. pp. 51–65. doi:10.3374/014.054.0103
Kentaro Chiba; Michael J. Ryan; Federico Fanti; Mark A. Loewen; David C. Evans (2018). «New material and systematic re-evaluation of Medusaceratops lokii (Dinosauria, Ceratopsidae) from the Judith River Formation (Campanian, Montana)». jornal of Paleontology (em inglês). in press. doi:10.1017/jpa.2017.62
Jordan C. Mallon, Christopher J. Ott, Peter L. Larson, Edward M. Iuliano and David C. Evans (2016). «Spiclypeus shipporum gen. et sp. nov., a Boldly Audacious New Chasmosaurine Ceratopsid (Dinosauria: Ornithischia) from the Judith River Formation (Upper Cretaceous: Campanian) of Montana, USA». PLoS ONE (em inglês). 11 (5). pp. e0154218. PMC4871577. PMID27191389. doi:10.1371/jornal.pone.0154218 !CS1 manut: Nomes múltiplos: lista de autores (link)
Ryan, M. J.; Evans, D. C.; Currie, P. J.; Loewen, M. A. (2014). «A new chasmosaurine from northern Laramidia expands frill disparity in ceratopsid dinosaurs». Naturwissenschaften (em inglês). 101. pp. 505–512. PMID24859020. doi:10.1007/s00114-014-1183-1
nih.gov
ncbi.nlm.nih.gov
Jordan C. Mallon, Christopher J. Ott, Peter L. Larson, Edward M. Iuliano and David C. Evans (2016). «Spiclypeus shipporum gen. et sp. nov., a Boldly Audacious New Chasmosaurine Ceratopsid (Dinosauria: Ornithischia) from the Judith River Formation (Upper Cretaceous: Campanian) of Montana, USA». PLoS ONE (em inglês). 11 (5). pp. e0154218. PMC4871577. PMID27191389. doi:10.1371/jornal.pone.0154218 !CS1 manut: Nomes múltiplos: lista de autores (link)
Ryan, M. J.; Evans, D. C.; Currie, P. J.; Loewen, M. A. (2014). «A new chasmosaurine from northern Laramidia expands frill disparity in ceratopsid dinosaurs». Naturwissenschaften (em inglês). 101. pp. 505–512. PMID24859020. doi:10.1007/s00114-014-1183-1