	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.
	Liang	1981	Early Permian cephalopods from Northwestern Gansu and Western Nei Monggol. Acta Paleontologica Sinica, 20 (6): 485-500, fig.1-12, pl.1-3; Beijing.