1. Agassiz, L. 1833–1843. Recherches sur les Poissons Fossiles. Petitpierre, Neuchâtel, Switzerland.
2. Aitkenhead, N. , Barclay, W.J. , Brandon, A. , Chadwick, R.A. , Chisholm, J.I. , Cooper, A.H. and Johnson, E.W. 2002. The Pennines and Adjacent Areas. 4th edn. British Geological Survey, Nottingham, UK.
3. THE CARBONIFEROUS GONIATITES OF THE NORTH OF ENGLAND AND THEIR ZONES
4. Notes on some Carboniferous cochliodonts with descriptions of seven new species;Branson;Journal of Geology,1905
5. British Geological Survey 2020 a. Geoindex Onshore, https://mapapps2.bgs.ac.uk/geoindex/home.html.