Social behaviour and mass mortality in the basal ceratopsian dinosaur Psittacosaurus (Early Cretaceous, People's Republic of China)

Q. Zhao, P. M. Barrett, and D. A. Eberth

2007

Article

Palaeontology 50(5):1023-1029

Find it at:

http://dx.doi.org/10.1111/j.1475-4983.2007.00709.x