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Rogers, Raymond R. (1990). «Taphonomy of three dinosaur bonebeds in the Upper Cretaceous Two Medicine Formation of northwestern Montana: evidence for drought-induced mortality». PALAIOS5 (5): 394-413. JSTOR3514834. doi:10.2307/3514834.
Falcon-Lang, Howard J. (2003). «Growth interruptions in silicified conifer woods from the Upper Cretaceous Two Medicine Formation, Montana, USA: implications for palaeoclimate and dinosaur palaeoecology». Palaeogeography, Palaeoclimatology, Palaeoecology199 (3–4): 299-314. doi:10.1016/S0031-0182(03)00539-X.
Rogers, R. R. (1990). «Taphonomy of three dinosaur bone beds in the Upper Cretaceous Two Medicine Formation, northwestern Montana: Evidence for drought-related mortality». PALAIOS5 (5): 394-41. JSTOR3514834. doi:10.2307/3514834.
jstor.org
Rogers, Raymond R. (1990). «Taphonomy of three dinosaur bonebeds in the Upper Cretaceous Two Medicine Formation of northwestern Montana: evidence for drought-induced mortality». PALAIOS5 (5): 394-413. JSTOR3514834. doi:10.2307/3514834.
Rogers, R. R. (1990). «Taphonomy of three dinosaur bone beds in the Upper Cretaceous Two Medicine Formation, northwestern Montana: Evidence for drought-related mortality». PALAIOS5 (5): 394-41. JSTOR3514834. doi:10.2307/3514834.
Arbour, V. M.; Currie, P. J. (2015). «Systematics, phylogeny and palaeobiogeography of the ankylosaurid dinosaurs». Journal of Systematic Palaeontology14 (5): 1-60. S2CID214625754. doi:10.1080/14772019.2015.1059985.