[21] Gould, Stephen Jay (1989). Wonderful life: the Burgess Shale and the nature of history. New York: W.W. Norton. pp. 194–206. ISBN 0‑393‑02705‑8.

[22] Mayr, Gerald, Peters, D. Stephan, Plodowski, Gerhard Vogel, Olaf. (2002). Bristle‑like integumentary structures at the tail of the horned dinosaur Psittacosaurus. Naturwissenschaften 89: 361–365.

[23] Xu, X., Tang, Z‑L., and Wang, X–L. (1999). “A therizinosauroid dinosaur with integumentary structures from China.” Nature, 399(6734): 350–354.

[24] Abel, O., 1912, Grundzüge der Palaeobiologie der Wirbeltiere, E. Schweizerbart’sche Verlagsbuchhandlung Nägele und Dr Sproesser, Stuttgart

[25] Coria, R. A.; Moly, J. J.; Reguero, M.; Santillana, S.; Marenssi, S. (2013). “A new ornithopod (Dinosauria; Ornithischia) from Antarctica”. Cretaceous Research. doi:10.1016/j.cretres.2012.12.004.

[26] Packard, G. C., Tracy, C. R. Roth, J. J. 1977. The physiological ecology of reptilian eggs and embryos, and the evolution of viviparity within the class Reptilia. Biology Review 52, 71‑105.

[27] Makádi, L. S.; Caldwell, M. W.;Ősi, A. (2012). “The First Freshwater Mosasauroid (Upper Cretaceous, Hungary) and a New Clade of Basal Mosasauroids”. In Butler, Richard J. PLoS ONE 7 (12): e51781.

[28] Kear, B. P. Barrett, P. M. 2011. Reassessment of the Early Cretaceous (Barremian) pliosauroid Leptocleidus superstes Andrews, 1922 and other plesiosaur remains from the nonmarine Wealden succession of southern England. Zoological Journal of the Linnean Society 161, 663–691.

[29] Eric Silver (2 August 1999). “Gay vulture couple raise surrogate chicks”. London: The Independent News. Retrieved 2009‑09‑21.

[30] Braithwaite, L. W., ‘Ecological studies of the Black Swan III – Behaviour and social organization’, Australian Wildlife Research 8, 1981: 134–146.

[31] Maleev, E.A. (1954). “New turtle‑like reptile in Mongolia [in Russian].” Priroda, 1954(3): 106–108.

[32] Wagler, J. (1830). Natürliches System der Amphibien Munich, 1830: 1–354.

[33] Frey, E.; and Tischlinger, H. (2012). “The Late Jurassic pterosaur Rhamphorhynchus, a frequent victim of the ganoid fish Aspidorhynchus?”. PLoS ONE 7 (3): e31945. doi:10.1371/journal.pone.0031945.

[34] Krause, Johannes; Fu, Qiaomei; Good, Jeffrey M.; Viola, Bence; Shunkov, Michael V.; Derevianko, Anatoli P. P??bo, Svante (2010), “The complete mitochondrial DNA genome of an unknown hominin from southern Siberia”, Nature 464 (7290): 894–897, doi:10.1038/nature08976, PMID 20336068.

[35] Amiot, R.; Buffetaut, E.; Lécuyer, C.; Wang, X.; Boudad, L.; Ding, Z.; Fourel, F.; Hutt, S.; Martineau, F.; Medeiros, A.; Mo, J.; Simon, L.; Suteethorn, V.; Sweetman, S.; Tong, H.; Zhang, F.; and Zhou, Z. (2010). “Oxygen isotope evidence for semi‑aquatic habits among spinosaurid theropods”. Geology 38 (2): 139–142. doi:10.1130/G30402.1.

[36] Wasson, R. Gordon (1968). Soma: Divine Mushroom of Immortality, p 238. Harcourt Brace Jovanovick. ISBN 0‑88316‑517‑1.

[37] Maxwell, W. D.; Ostrom, J.H. (1995). “Taphonomy and paleobiological implications of Tenontosaurus – Deinonychus associations”. Journal of Vertebrate Paleontology 15 (4): 707–712. doi:10.1080/02724634.1995.10011256.

[38] Xu, X.; Wang, K.; Zhang, K.; Ma, Q.; Xing, L.; Sullivan, C.; Hu, D.; Cheng, S. et al. (2012). “A gigantic feathered dinosaur from the Lower Cretaceous of China” (PDF). Nature 484: 92–95. doi:10.1038/nature10906. PMID 22481363.

[39] Unwin, David M. (2006). The Pterosaurs: From Deep Time. New York: Pi Press. p. 246. ISBN 0‑13‑146308‑X.

[40] Coombs, W. P. 1975. Sauropod habits and habitats. Palaeogeography, Palaeoclimatology, Palaeoecology 17, 1‑33.

[41] Novas, Fernando E.; Diego Pol, Juan I. Canale, Juan D. Porfiri and Jorge O. Calvo (2008‑12‑16). “A bizarre Cretaceous theropod dinosaur from Patagonia and the evolution of Gondwanan dromaeosaurids”. Proceedings of the Royal Society B (The Royal Society) 276 (1659): 1101–7. doi:10.1098/rspb.2008.1554. PMC 2679073. PMID 19129109.

[42] Codron, D. et al., ‘Ontogenetic niche shifts in dinosaurs influenced size, diversity and extinction in terrestrial vertebrates’, Biology Letters, 2012. doi:10.1098/rsbl.2012.0240.

[43] Mayor, Adrienne. The First Fossil Hunters: Paleontology in Greek and Roman Times (Princeton University Press) 2000 ISBN 1400838444.

[44] Russell, D. A.; Séguin, R. (1982). “Reconstruction of the small Cretaceous theropod Stenonychosaurus inequalis and a hypothetical dinosauroid”. Syllogeus 37: 1–43.

[45] Naish, D. (2006). Dinosauroids Revisited Darren Naish: Tetrapod Zoology, April 23, 2011.

[46] Marsh OC (1877). “A new order of extinct Reptilia (Stegosauria) from the Jurassic of the Rocky Mountains”. American Journal of Science 3 (14): 513–514.

[47] Ballou, W. H. (1920, August 15). The Aeroplane Dinosaur of a Million Years Ago. The Ogden Standard‑Examiner, pp. 8. Retrieved from http://chroniclingamerica.loc.gov/lccn/sn85058393/1920‑08‑15/ed‑1/seq‑32/

[48] Wedel MJ. Evidence for bird‑like air sacs in saurischian dinosaurs. Journal of Experimental Zoology Part A: Ecological Genetics and Physiology. 2009 Oct 1;311(8): 611‑28. doi: 10.1002/jez.513.

[49] Zheng, Xiao‑Ting; You, Hai‑Lu; Xu, Xing; Dong, Zhi‑Ming (19 March 2009). “An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures”. Nature 458 (7236): 333–336. doi:10.1038/nature07856. PMID 19295609.

[50] Godefroit, P.; Demuynck, H.; Dyke, G.; Hu, D.; Escuillié F. O.; Claeys, P. (2013). “Reduced plumage and flight ability of a new Jurassic paravian theropod from China”. Nature Communications 4: 1394. doi:10.1038/ncomms2389. PMID 23340434.

[51] Sharov, A.G. (1970). “A peculiar reptile from the lower Triassic of Fergana”. Paleontologiceskii Zhurnal (1): 127–130.

[52] Fraser, N. (2006). Dawn of The Dinosaurs: Life in the Triassic. Bloomington: Indiana University Press. ISBN 978‑025‑334‑3.

[53] Prum, R. O./Unwin, D.M., Benton, M.J./Response; Jones, T.D., Ruben, J.A., Maderson, P.F.A., Martin, L.D. (9 March 2001). “Longisquama Fossil and Feather Morphology”. Science 291 (5510): 1899–1902. doi:10.1126/science.291.5510.1899c. PMID 11245191.

[54] Peters, D. (2006). “The Other Half of Longisquama”. Prehistoric Times 75: 10–11.

[55] Solar‑powered Sea Slug Harnesses Stolen Plant Genes, New Scientist, 2008‑11‑24.

[56] Snow, F. H. (1878). “On the dermal covering of a mosasauroid reptile”. Transactions of the Kansas Academy of Science 6: 54–58.

[57] Kaddumi, H.F. (2009). “On the latest scale coverings of mosasaurs (Squamata: Mosasauridae) from the Harrana Fauna in addition to the description of s new species of Mosasaurus”. Fossils of the Harrana Fauna and the Adjacent Areas. Amman: Eternal River Museum of Natural History. pp. 80–94.

[58] Xu, X., Z. Zhou, X. Wang, X. Kuang, F. Zhang, X. Du. 2003. Four‑winged dinosaur from China.‑ Nature, 421, 335–340.

[59] Varricchio, D. J., A. J. Martin, Y. Katsura. 2007. First trace and body fossil evidence of a burrowing, denning dinosaur.‑ Proceedings of Royal Society Biological Sciences, 274, 1361–1368.