Ding, Y. J.; Xia, G. Y.; Li, L. et al. (1991). 东秦岭陕西镇安西口地区石炭系-二叠系界线及生物群 - The Carboniferous-Permian boundary and faunas from Xikou area, Zhen'an County, Shaanxi in eastern Qinling Mountains. 中国地质科学院天津地质矿产研究所文集 - Bulletin of the Tianjin Institute of Geology and Mineral Resources CAGS. 24: 1-202 (in Chinese).
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Ding, Y. J.; Xia, G. Y.; Li, L. et al.
1991
东秦岭陕西镇安西口地区石炭系-二叠系界线及生物群 - The Carboniferous-Permian boundary and faunas from Xikou area, Zhen'an County, Shaanxi in eastern Qinling Mountains
中国地质科学院天津地质矿产研究所文集 - Bulletin of the Tianjin Institute of Geology and Mineral Resources CAGS