RYAN, Michael J., EVAN, David, C.; CURRIE, Philip J.; BROWN, Caleb M.; BRINKMAN, Don New leptoceratopsids from the Upper Cretaceous of Alberta, Canada. Cretaceous Research in press, 2011. Dostupné online. DOI: 10.1016/j.cretres.2011.11.018.
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RYAN, Michael J., EVAN, David, C.; CURRIE, Philip J.; BROWN, Caleb M.; BRINKMAN, Don New leptoceratopsids from the Upper Cretaceous of Alberta, Canada. Cretaceous Research in press, 2011. Dostupné online. DOI: 10.1016/j.cretres.2011.11.018.
