	Authors	Year	Title
	Becker & Mapes	2010	Uppermost Devonian ammonoids from Oklahma and their palaeobiogeographic significance. Acta Geologica Polonica, 60 (2): 139-163, 11 fig.
	Czarnocki	1989	Klimenie Gór Swietokrzyskich. Prace Panstw. Inst. Geol., 127: 1-91, fig.1-21, tab.1-3, pl.1-50; Warszawa.