	Authors	Year	Title
	Currie	1954	Scottish Carboniferous Goniatites. Transactions of the Royal Society. Edinburgh, 62, part 2 (No.14): 527-602, fig.1-9, 1tab., pl.1-4; Edinburgh.
	Saunders & Work	1999	The Cravenoceras-Glaphyrites dilemma: Ammonoid sutures vs. shell shape in the Mid-Carboniferous. In: Rozanov,A.Yu. & Shevyrev,A.A. (eds.), Fossil cephalopods: Recent advances in their study, Ross.Akad.Nauk, Paleont.Inst.:125-137,8 figs.,1 pl.,Mosk
	Shkolin	2000	O nizhnekamennougol'nykh ammonoideyakh Podmoskovskogo Basseina. In: Zonal'nye podrazdeleniya karbona obshchei stratigraficheskoi shkaly Rossii. (In Russian). Materialy Vserossiiskogo Sovechaniya [Zonal Carboniferous subdivisions of the General Stratigraphic Scale of Russia], p. 104-105, Ufa (Gilem).