	Authors	Year	Title
	Glenister, Baker & Furnish	1990	Additional Early Permian ammonoid cephalopods from Western Australia. [Glenister,B.F., Baker,C., Furnish,W.M. & Thomas,G.A.] Journal of Paleontology, 64 (3): 392-399, fig.1-4, 1tab.; Tulsa, Okla.
	Kullmann & Ramovs	1980	Cephalopoden aus dem Oberkarbon (Gzhelium) und Unterperm der Karawanken. Geologica at Palaeontologica, 14: 195-208, fig.1-5, pl.1-2; Marburg.