Authors	Year	Title
Delépine	1940a	Les goniatites du Dinantien de la Belgique. Museé royal d`histoire naturelle Belgique, 91: 1-91, pl.1-5;
Gordon	1965	Carboniferous Cephalopods of Arkansas. Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
Matthews	1970	A new cephalopod fauna from the Lower Carboniferous of east Cornwall. Palaeontology, 13 (1): 112-131, fig.1-6, pl.25-28; London.