MARTILL, D.M. (1989)
A new hybodont shark (Hybodus dawni) from the Oxford Clay of Peterborough, Cambridgeshire. Mercian Geologist, 11 (4): 245–249, 1 fig., 1 pl.
MARTILL, D.M. (1991)
Fish. In: MARTILL,D.M. & HUDSON, J.D. (eds): Fossil of the Oxford Clay. London: The Paleontological Association: 197– 22s.