	Authors	Year	Title
	Elias	1938	Studies of Late Paleozoic ammonoids. Journal of Paleontology, 12 (1): 86-100, pl.19,20; Tulsa,Oklahoma.
	Elias	1962	Differentiation of species in Gonioloboceras. Paläontologische Zeitschrift, H.Schmidt-Festband: 29-37, pl.3,4; Stuttgart.
	Liang & Wang	1988	Carboniferous Cephalopods of Xinjiang, NW China. In: Wiedmann,J. & Kullmann,J. (eds.), Cephalopods - Present and Past, 553-575, 2 text-figs., 1 tabl., 6 pls., Stuttgart.
	Liang & Wang	1991	Carboniferous cephalopods of Xinjiang. Paleontologica Sinica, n.ser.B, 180: 1-171, fig.1-104, pl.1-40; Nanjing.
	Manger & Saunders	1980	Lower Pennsylvanian (Morrowan) ammonoids from the North American midcontinent. Journal of Paleontology, 54, Suppl.(3): 1-56, fig.1-21, pl.1-6, tab.1-10; Tulsa, Okla.
	Miller & Unklesbay	1943	The siphuncle in Late Paleozoic amonoids. Journal of Paleontology, 17 (1): 1-25, fig.1-9, pl.1-5; Tulsa,Oklahoma.
	Plummer & Scott	1937	Upper Paleozoic ammonites in Texas. The geology of Texas, vol.3 pt.1, Bull. Texas. Univ., 3701: 1-516, fig.1-88, pl.1-41; Austin, Texas.
	Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.