Foth, C.; Rauhut, O. W. M. (2017). "Re-evaluation of the Haarlem Archaeopteryx and the radiation of maniraptoran theropod dinosaurs". BMC Evolutionary Biology.17: 236. doi: 10.1186/s12862-017-1076-y
Forster, Catherine A.; Sampson, Scott D.; Chiappe, Luis M.; Krause, David W. (1998a). "The Theropod Ancestry of Birds: New Evidence from the Late Cretaceous of Madagascar". Science.279 (5358): 1915–1919. doi: 10.1126/science.279.5358.1915