A ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of west Siberia, Russia and its phylogenetic relationships
A. O. Averianov,
A. V. Voronkevich,
S. V. Lechchinskiy, and
A. Fayngertz
2006
Article
Journal of Systematic Palaeontology
4(4):359-395
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