	Authors	Year	Title
	Butcher & Hodson	1960	A Review of the Carboniferous Goniatite Zones in Devon and Cornwall. Palaeontology, 3 (1): 75-81, pl.17-19; London.
	Currie	1954	Scottish Carboniferous Goniatites. Transactions of the Royal Society. Edinburgh, 62, part 2 (No.14): 527-602, fig.1-9, 1tab., pl.1-4; Edinburgh.