GINTER, M. & DUFFIN, C.J. & DEAN, M.T. & KORN, D. (2015)
Late Viséan pelagic chondrichthyans from northern Europe. Acta Palaeontologica Polonica, 60 (4): 899–922
DOI: 10.4202/app.00084.2014
SMITH, R. & MARTILL, D.M. & DUFFIN, C. (2017)
The shark-beds of the Eyam Limestone Formation (Lower Carboniferous, Viséan) of Steeplehouse Quarry, Wirksworth, Derbyshire, UK. Proceedings of the Geologists Association, 128 (3): 374-400
DOI: 10.1016/j.pgeola.2017.04.004