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↑ Vickaryous, M.K., Maryańska, T., and Weishampel, D.B., (2004). Weishampel, D. B., Dodson, P., and Osmólska, H. (eds.). ed. The Dinosauria (Second Edition). University of California Press. ISBN 0-520-24209-2
↑ Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; (2004): A Geologic Time Scale 2004, Cambridge University Press.
↑ Harrison, C.J.O. and Walker, C.A. (1973): Wyleyia: a new bird humerus from the Lower Cretaceous of England. Palaeontology 16(4): 721-728. PDF fulltext
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