Butler, Richard J.; Roger M. H. Smith and David B. Norman. A primitive ornithischian dinosaur from the Late Triassic of South Africa, and the early evolution and diversification of Ornithischia. Proceedings of the Royal Society B: Biological Sciences. 2007. doi:10.1098/rspb.2007.0367.引文使用过时参数coauthors (帮助)
