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Ryan, M. J.; Evans, D. C.; Currie, P. J.; Loewen, M. A. A new chasmosaurine from northern Laramidia expands frill disparity in ceratopsid dinosaurs. Naturwissenschaften. 2014, 101: 505–512. PMID 24859020. doi:10.1007/s00114-014-1183-1.