	Authors	Year	Title
	Bartzsch & Weyer	1988	Die unterkarbonische Ammonoidea-Subfamilia Karagandoceratinae. Freiberger Forschungs-Hefte, C, 419: p.130-142, fig.1-3; Leipzig.
	Frest, Glenister & Furnish	1981	Pennsylvanian--Permian Cheiloceratacean Ammonoid Families Maximitidae and Pseudohaloritidae. Journal of Paleontology, 55, Suppl. 3: 1-46, fig.1-19, pl.1-7; Tulsa, Okla.