Summers, A.P. & Ketcham, R.A. & Rowe, T. (2004)
Structure and Function of the Horn Shark (Heterodontus francisci) Cranium Through Ontogeny: Development of a Hard Prey Specialis. Journal of Morphology, 260(1), 1–12
DOI: 10.1002/jmor.10141

Rowe, T. & Cifelli, R.L. & Lehman, T.M. & Weil, A. (1992)
The Campanian Terlingua local fauna, with a summary of other vertebrates from the Aguja Formation, Trans-Pecos Texas. Journal of Vertebrate Paleontology, 12(4), 472–493
DOI: 10.1080/02724634.1992.10011475