We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleVariation, variability, and the origin of the avian endocranium: insights from the anatomy of Alioramus altai (Theropoda: Tyrannosauroidea).AuthorsBever GS; Brusatte SL; Balanoff AM; Norell MAPublicationPloS one, 2011, Vol 6, Issue 8, pe23393ISSN1932-6203Publication typearticleDOI10.1371/journal.pone.0023393