Authors Year Title
Xu 1979 Late Lower Permian strata and ammonoids in Central Guangdong. [In Chinese].
Contributions to Stratigraphy and Palaeontology, Yichang Institute of Geology and Mineral Resources 1979: 34-45, 3 fig., 1 pl.
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