	Authors	Year	Title
	Sheng	1984	Late Lower Permian ammonoids from Xiukang Formation, Lhaze District, Xizang (Tibet). Himalaya Geology 1981, II: 219-243, fig.1-12, tab.1-2, pl.1-4; Beijing.
	Sheng	1988b	Late Lower Permian ammonoids of the Langcuo Formation from Angren district South Xizang (Tibet). Tectonic evolution of the lithosphere of the Himalayas: 149-180, fig.1-14, pl.1-5; Beijing.