	Authors	Year	Title
	Furnish & Glenister	1970	Permian Ammonoid Cyclolobus from the Salt Range, West Pakistan in Kummel,B. & Teichert,C. (eds): Stratigraphic boundary problems: Permian and Triassic of West Pakistan. University of Kansas Department of Geology Special Publication 4: 153-175, fig.1,2, tab.1,2, pl.1-4.
	Schindewolf	1955	Über die Faunenwende vom Paläozoikum zum Mesozoikum. Zeitschrift der Deutschen Geologischen Gesellschaft, 105 (2): 153-182, fig.1-5, pl.5-6; Hannover.
	Spinosa, Furnish & Glenister	1975	The Xenodiscidae, Permian ceratitoid ammonoids. Journal of Paleontology, 49 (2): 239-283, fig.1-22, tab.1-5, pl.1-8.