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Xu X., Zheng X.-t. and You, H.-l. (2009). "A new feather type in a nonavian theropod and the early evolution of feathers." Proceedings of the National Academy of Sciences (Philadelphia), . doi:10.1073/pnas.0810055106PubMed
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Xu, X.; Tang, Z-L.; Wang, X-L. (). „A therizinosauroid dinosaur with integumentary structures from China”. Nature. 399 (6734): 350–354. Bibcode:1999Natur.399..350X. doi:10.1038/20670.
Xu X., Zheng X.-t. and You, H.-l. (2009). "A new feather type in a nonavian theropod and the early evolution of feathers." Proceedings of the National Academy of Sciences (Philadelphia), . doi:10.1073/pnas.0810055106PubMed