	Authors	Year	Title
	Gao, Ruan & Chen	1983	Cephalopoda.[In Chinese]. [Gao,Y., Ruan,Y., Chen,J. & Wen,Yuling]. Paleontological Atlas of Northwestern China. Shaanxi, Gansu and Ningxia Volume. Part II. Upper Paeozoic: 452-475, fig.136-165, pl.151-155; Beijing.