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.
Ruan & Zhou 1987 Carboniferous cephalopods in Ningxia Hui Autonomous Region. [In Chinese, with Engl. summary].
Namurian Strata and Fossils of Ningxia, China: 55-177, 78 text-figs., 15 pls., Nanjing.