	Authors	Year	Title
	Miller & Garner	1955	Lower Mississippian cephalopods of Michigan. Part III. Ammonoids and summary. Contributions, Museum of Paleontology. Univ. Michigan, 12: 113-173, fig.1-16, pl.1-7; Michigan.
	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).
	Weyer	1972	Zum Alter der Ammonoideen-Faunen des Marshall-Sandsteins (Unterkarbon; Michigan, USA). Berichte der deutschen Gesellschaft der geologischen Wissenschaften, A, Geol. Paläont., 17 (3): 325-350, 1 fig., 1 tab.; Berlin.