	Authors	Year	Title
	Ruan	1987	Amonoids from the upper Middle Devonian in Yiwa Ravine of Tewo, West Qinling Mts., China. In: Late Silurian-Devonian strata and fossils from Luqu-Tewo area of West Qinling Mountains, China.- 219-226, fig.124-129, pl.132; Nanjing (Univ. Pr.)