Giffin, E. B., Gabriel. D. L., and Johnson, R. E. (1987). A new pachycephalosaurid skull from the Cretaceous Hell Creek Formation of Montana. J. Vert. Paleontol. 7: 398-407.

Giffin, E.B., (1989). Pachycephalosaur Paleoneurology (Archosauria: Ornithischia). Journal of Vertebrate Paleontology, 9(1):67-77.

Giffin, E.B. (1989): Notes on Pachycephalosaurs (Ornithischia). J.Paleont. 63(4): 525-529

Giffin, E. B. (1990). Gross spinal anatomy and limb use in living and fossil reptiles. Paleobiology, 16(4): 448-459.

Giffin, E.B. (1991). Endosacral enlargements in dinosaurs. Mod. Geol. 16, 101-112

Giffin, E.B. (1994) Functional interpretation of spinal anatomy in living and fossil amniotes. In Functional morphology. In vertebrate paleontology ed. Jeff Thomason

Giffin, E.B. (1995). Postcranial paleoneurology of the Diapsida. J. Zool. (London) 235, 389-410