	Authors	Year	Title
	Chao	1955	Some Permian ammonoids from Kwangsi and their significance. [In Chinese, with extended English summary]. Acta Palaeontologica Sinica, 3 (2): 146-158, 2 pls.
	Xu & Wei	1977	Fossil Atlas of South-Central China, part 2, Cephalopoda. [In Chinese.] Yichang Institute of Geology and Mineral Resources 1977: p.537-582, pl.204-218, (Geological Publishing House).