1. Farlow, J.O. & Dodson, P. The behavioral significance of frill and horn morphology in ceratopsian dinosaurs. Evolution29, 353–361 (1975).
2. Farke, A. A. Horn use in Triceratops (Dinosauria: Ceratopsidae): testing behavioral hypotheses using scale models. Palaeontol. Electronica7, μμhttp://palaeo-electronica.org/paleo/2004_3/horn/issue1_04.htm (2004).
3. Farke, A. A., Wolff, E. D. S. & Tanke, D. H. Evidence of combat in Triceratops. PLoS ONE4(1), e4252, doi:10.1371/journal.pone.0004252 (2009).
4. Hicks, J. F., Johnson, K. R., Obradovich, J. D., Tauxe, L. & Clark D in The Hell Creek Formation and the Cretaceous-Tertiary Boundary in the Northern Great Plains: an Integrated Continental Record of the End of the Cretaceous (eds. Hartman, J. H., Johnson, K. R. & Nichols, D. J.) 35-55 (Geological Society of America, Boulder, CO, Special Paper 361, 2002).
5. Horner, J. R., Goodwin, M. B. & Myhrvold, N. Dinosaur census reveals abundant Tyrannosaurus and rare ontogenetic stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA. PLoS ONE6(2), e16574, doi: 10.1371/journal.pone.0016574 (2011).
6. Scannella, J. B., Fowler, D. W., Goodwin, M. B. & Horner J. R. Evolutionary trends in Triceratops from the Hell Creek Formation, Montana. Proc. Natl. Acad. Sci. USA111(28), 10245-10250 (2014).
7. Lull, R. S. A revision of the Ceratopsia or horned dinosaurs. Mem. Peabody
Mus. Nat. Hist.3, 1–175 (1933).
8. Molnar, R. E. Analogies in the evolution of combat and display structures in
ornithopods and ungulates. Evol. Theory.3, 165–190 (1977).
9. Tanke, D. H. & Farke, A. A. in Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs (ed. Carpenter, K.) 319-347 (Indiana University Press, Bloomington, 2006).
10. Baylink, D., Wergedal, J. & Thompson, E. Loss of proteinpolysaccharides at sites where bone mineralization is initiated. J. Histochem. Cytochem.20, 279-292 (1972).
11. Marsell, R. & Einhorn, T. A. The biology of fracture healing. Injury42(6), 551-555 (2011).
12. Ortner, D. J. in Identification of Pathological Conditions in Human Skeletal Remains (ed. Ortner, D.) 179-224 (Academic Press, Boston, 2nd Edition, 2003).
13. Schultz, M. Paleohistopathology of bone: a new approach to the study of ancient diseases. Yearb. Phys. Anthropol.44, 106-147 (2001).
14. Ortner, D. J. & Turner-Walker, G. (2003) in Identification of Pathological Conditions in Human Skeletal Remains (ed. Ortner, D. J.) 11-35 (Academic Press, Boston, 2nd Edition, 2003).
15. Burr, D. B., Schaffler, M. B. & Frederickson, R. G. Composition of the cement line and its possible mechanical role as a local interface in human compact bone. J. Biomech.21(11), 939-945 (1988).
16. Campo, R. D. Protein-polysaccharides of cartilage and bone in health and disease. Clin. Orthop.68, 182-209 (1970).
17. Herring, G. M. in The Biochemistry and Physiology of Bone (ed. Bourne, G. H.) 127-189 (Vol 1, Academic Press, New York, 1972).
18. Urist, M. R. in Bourne GH (ed) The Biochemistry and Physiology of Bone (ed. Bourne, G. H.) 1-59 (Academic Press, New York, Vol. 4, 1976).
19. Takagi, M. et al. Ultrastructural cytochemistry of complex carbohydrates in osteoblasts, osteoid, and bone matrix. Calcif. Tissue Int.35, 309-319 (1983).
20. DiGeronimo, P. M. & Brandão J. Orthopedics in reptiles and amphibians. Vet. Clin. Exot. Anim.22, 285–300 (2019).
21. McGavin, M. D. & Zachary, J. F. Pathologic Basis of Veterinary Disease (Elsevier, Mosby, 4th ed., 2006).