Ouyang & Li 1980. [Microflora from the Ka-yi-tou Formation of Fuyuan district, E. Yunnan and its bearing on stratigraphy and palaeobotany.] Qianxi diandong wan erdieshi hanmei diceng he gushengwuqun. [Stratigraphy and palaeontology of Upper Permian coal-bearing formation in western Guizhou and eastern Yunnan, China., Science Press, Peking, 1980: 123-194. Chapter pagination: 123-194