Authors Year Title
Zhou 1985 Several problems in the Early Permian ammonoids from South China.
Palaeontologia Cathayana, 2: 179-210, 20 figs., pl.1-5.
Zhou 1987 Early Permian ammonoid-fauna from southeastern Hunan. [In Chinese, with English abstract].
In: Nanjing Institute of Geology and Paleontology,Academia Sinica, ed.,Collection of Postgraduate Theses, 1: 285-348,33 fig., 9 pl. (Jiangsu Sci. and Technol.Publ.House), Nanjing