Edwards, D.; YI, W.; Bassett, M. G.; Sen, L. C. (2007). The earliest vascular plant or a later rooting system? Pinnatiramosus qianensis from the marine Lower Silurian Xiushan Formation, Guizhou Province, China. Palaios. 22(2): 155-165.
The earliest vascular plant or a later rooting system? Pinnatiramosus qianensis from the marine Lower Silurian Xiushan Formation, Guizhou Province, China