Sykes, J.H. (1971)
A new dalatiid fish from the Rhaetic Bond Bed at Barnstone, Nottinghamshire. Mercian Geologist, 4(1), 13–22

Sykes, J.H. (1974)
Teeth of Dalatias barstonensis in the British Rhaetic. Mercian Geologist, 5(1), 39–48

Sykes, J.H. (1974)
On elasmobranch dermal denticles from the Rhaetic bone bed at Barnstone, Nottinghamshire. Mercian Geologist, 5(1), 49–64.