Santander-Neto, J. & de Queiroz, B.J. & Nascimento, F.C.P. & Basílio, T.H. & de Medeiros, R.S. & Furtado Neto, M.A.A. & Faria, V.V. (2007)
On the occurence of sevengill and sixgill sharks (Hexanchiformes: Hexanchidae) off Ceará State, Brazil, Western Equatorial Atlantic.
Arquivos de Ciências do Mar, 40(2), 59–63