Underwood, C.J. & Mitchell, S.F. & Veltkamp, C.J. (1999)
Shark and ray teeth from the Hauterivian (Lower Cretaceous) of North-East England. Palaeontology, 42(2), 287–302
DOI: 10.1111/1475-4983.00074

Kennedy, W.J. & King, C. & Ward, D.J. (2008)
The upper Albian and lower Cenomanian succession at Kolbay, eastern Mangyshlak (southwest Kazakhstan). Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Science de la Terre, 78, 117–147