	Authors	Year	Title
	Wang	1989	Probe into replacement of ammonites between Permian and Triassic. Acta Paleontologica Sinica, 28 (5): 553-561, tab.1-2; Beijing.
	Wang & Yang	1992	Discovery of Spathian ammonoid fauna from Eastern Kunlun Mountains. Acta Palaeontologica Sinica, 31 (3): 350-356, 3 figs., 1 pl., Nanjing.