DENG Sheng-Hui, SUN Ke-Qin, LI Cheng-Sen. A New Gleicheniaceous Fern Chansitheca (Sphenopteris) wudaensis from the Lower Permian of Wuda, Nei Mongol, China[J]. J Integr Plant Biol, 2000, 42(5): 533-538.
DENG Sheng-Hui, SUN Ke-Qin, LI Cheng-Sen. A New Gleicheniaceous Fern Chansitheca (Sphenopteris) wudaensis from the Lower Permian of Wuda, Nei Mongol, China[J]. J Integr Plant Biol, 2000, 42(5): 533-538.