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Richard J. Butler, Jin Liyong, Chen Jun, Pascal Godefroit (2011). “The postcranial osteology and phylogenetic position of the small ornithischian dinosaur Changchunsaurus parvus from the Quantou Formation (Cretaceous: Aptian–Cenomanian) of Jilin Province, north-eastern China”. Palaeontology54 (3): 667–683. doi:10.1111/j.1475-4983.2011.01046.x.
Mayr, Gerald; Peters, D. Stephan; Plodowski, Gerhard; Vogel, Olaf (August 2002). “Bristle-like integumentary structures at the tail of the horned dinosaur Psittacosaurus”. Naturwissenschaften (Heidelberg: Springer Berlin) 89 (8): 361–365. doi:10.1007/s00114-002-0339-6. PMID12435037.