	Authors	Year	Title
	Guo	1988	Late Permian ammonoids from lower Yangtze area and their palaeoecological significance. Acta Paleontologica Sinica, 27 (3): 390-397, fig.1-8, pl.1-2; Beijing.
	Liang & Guo	1982	Cephalopoda. Paleontological Atlas of East China. Volume of Late Paeozoic: 257-307, fig.1-90, pl.103-118; Beijing.