27
Burghardt, G. 2005. The Genesis of Animal Play: Testing the Limits. MIT Press, Cambridge, MA.
28
Naish, D. 2009. Dinosaurs come out to play (so do turtles, and crocodilians, and Komodo dragons). Tetrapod Zoology ver 2 http://tinyurl.com/9fw5odb
29
Lambe, L. M. 1917. The Cretaceous theropodous dinosaur Gorgosaurus. Memoirs of the Geological Society of Canada 100, 1-84.
30
Naish, D. 2008. Sleep behaviour and sleep postures. Tetrapod Zoology ver 2 http://tinyurl.com/95bz7fc
31
O'Keefe, F. R., Street, H. P., Wilhelm, B. C., Richards, C. D. & Zhu, H. 2011. A new skeleton of the cryptoclidid plesiosaur Tatenectes laramiensis reveals a novel body shape among plesiosaurs. Journal of Vertebrate Paleontology 31, 330–339.
32
Bailey, J. B. 1997. Neural spine elongation in dinosaurs: sailbacks or buffalo-backs? Journal of Paleontology 71, 1124–1146.
33
Naish, D. 2010. Concavenator: an incredible allosauroid with a weird sail (or hump)… and proto-feathers? Tetrapod Zoology ver 2 http://tinyurl.com/9pypuf4
34
Paul, G. S. 1987. The science and art of restoring the life appearance of dinosaurs and their relatives-a rigorous how-to guide. В книге Czerkas, S. J. & Olson, E. C. (eds) Dinosaurs Past and Present Vol. II. Natural History Museum of Los Angeles County/University of Washington Press (Seattle and London), pp. 4-49.
35
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.
36
Mayr, G., et al. (2002) " Bristle-like integumentary structures at the tail of the horned dinosaur Psittacosaurus. " Naturwissenschaften, Vol. (89), pp. 361-365
37
Varricchio, David J.; Martin, Anthony J.; and Katsura, Yoshihiro (2007). "First trace and body fossil evidence of a burrowing, denning dinosaur". Proceedings of the Royal Society B: Biological Sciences 274 (1616): 1361-8
38
Xu, X., Zhou, Z., Wang, X., Kuang, X., Zhang, F. & Du, X. 2003. Four-winged dinosaurs from China. Nature 421, 335–340.
39
Mayr, G., Peters, D. S. & Plodowski, G. 2002. Bristle-like integumentary structures at the tail of the horned dinosaur Psittacosaurus. Naturwissenschaften 89, 361–365.
40
Bakker, R. T. 1986. The Dinosaur Heresies. Penguin Books (London).
41
Bakker, R. T. 1971. Ecology of the Brontosaurs. Nature 229, 172–174.