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
Zhou	2007	Unusually Large Specimens of the Permian Ammonoid Guiyangoceras from Hunan, South China. Paleontologicheskii Zhurnal, 2007, 41 (2):123-127.