	Authors	Year	Title
	Bisat	1952	The goniatite succession at Cowdale Clough, Barnoldswick, Yorkshire. Transactions of the Leeds Geologists Association, 6 (4): 155-181, fig.1-3, pl.1-3; Kendal.
	Miller & Furnish	1940a	Studies on Carboniferous ammonoids: parts 1-4. Journal of Paleontology, 14: 356-377, fig.1-17, pl.45-49; Tulsa, Okla.
	Moore	1946	The Carboniferous goniatite genera Girtyoceras and Eumorphoceras. Proceedings of the Yorkshire Geological Society, 25: 387-445, 31 figs., pl.22-27; Wakefield.
	Moore	1952	Notes on the genera Prolecanites and Epicanites with description of two new species. Liverpool and Manchester Geological Journal, 1 (1): 71-76, fig.1-4, pl.7; Liverpool.