	Authors	Year	Title
	Chao	1965	The Permian ammonoid-bearing formations of South China. Scientia Sinica, 14 (12): 1813-1826, fig.1-4, pl.1-2; Beijing.
	Zhou	1985	Several problems in the Early Permian ammonoids from South China. Palaeontologia Cathayana, 2: 179-210, 20 figs., pl.1-5.