	Authors	Year	Title
	Frest, Glenister & Furnish	1981	Pennsylvanian--Permian Cheiloceratacean Ammonoid Families Maximitidae and Pseudohaloritidae. Journal of Paleontology, 55, Suppl. 3: 1-46, fig.1-19, pl.1-7; Tulsa, Okla.
	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.
	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).
	Zhou	1979	Distribution of the Early Permian Pseudohalorites-fauna (Cephalopoda) in Hunan with notes on some new genera. Acta Paleontologica Sinica, 18 (4): 383-394, fig.1-5, pl.1-2; Beijing.
	Zhou, Glenister & Furnish	1989	Two-fold or three-fold - concerning geological time-scale of Permian period. Acta Paleontologica Sinica, 28 (3): 269-282,fig.1-4, tab.1-4; Beijing.
	Zhou, Zhu & Li	1995	Permian Maokouan nearshore sea of South China and its ammonoid fauna. [Zhou Zuren, Zhu De-shou, Li-Fuyu & Hu Yao-hua. In Chinese, with English Summary]. Acta Palaeontologia Sinica, 34 (5): 525-548, 6 fig., 4 pl., Nanjing.
	Zhou, Glenister & Furnish	2002	Endemic Permian ammonoid genus Yinoceras, central Hunan, south China. Journal of Paleontology, 76 (3): 424-430, 7 fig., Lawrence, KS.