1997 IUCN red list of threatened plants (1997)

Flora of China - Missouri Botanical Garden. (Science Press, 1900)

la han zhong zi zhi wu ming chen - Zhongguo ke xue yuan bian yi chu ban wei yuan hui ming ci shi bian ding (ke xue chu ban she)

la han zhong zi zhi wu ming chen (bu bian) - Zhongguo ke xue yuan bian yi chu ban wei yuan hui ming ci shi (zhong guo ke xue yuan)

The World List of Threatened Trees (1998)