Euoplocephalus tutus and the Diversity of Ankylosaurid Dinosaurs in the Late Cretaceous of Alberta, Canada, and Montana, USA Arbour, Victoria M. ; Currie, Philip J. Abstract Publication: PLoS ONE Pub Date: May 2013 DOI: 10.1371/journal.pone.0062421 Bibcode: 2013PLoSO...862421A