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Persons, Walter S.; Currie, Philip J. (2015). «Bristles before down: A new perspective on the functional origin of feathers». Evolution (em inglês). 69 (4): 857–862. ISSN1558-5646. PMID25756292. doi:10.1111/evo.12634
Zelenitsky, D. K.; Therrien, F.; Erickson, G. M.; DeBuhr, C. L.; Kobayashi, Y.; Eberth, D. A.; Hadfield, F. (26 de outubro de 2012). «Feathered Non-Avian Dinosaurs from North America Provide Insight into Wing Origins». Science (em inglês). 338 (6106): 510–514. Bibcode:2012Sci...338..510Z. ISSN0036-8075. PMID23112330. doi:10.1126/science.1225376