Authors	Year	Title
Clausen	1969	Oberdevonische Cephalopoden aus dem Rheinischen Schiefergebirge. II. Gephuroceratidae,Beloceratidae. Palaeontographica Abt. A, 132: 95-178, fig.1-23, tab.1-11, pl.22-26; Stuttgart.
House & Pedder	1963	Devonian goniatites and stratigraphical correlations in Western Canada. Palaeontology, 6: 491-539, fig.1-15, pl.70-77; London.
House	1978	Devonian amonoids from the Appalachians and their bearing on international zonation and corelation. Special Papers Paleontology, 21: 1-70, fig.1-12, pl.1-10; London.