DePalma, R. A.; Burnham, D. A. .; Martin, L. D.; Larson, P. L.; Bakker, R. T. The First Giant Raptor (Theropoda: Dromaeosauridae) from the Hell Creek Formation. paleocontributions 2015, No. 14, 1-16. https://doi.org/10.17161/paleo.1808.18764.