ZHANG Yun, KONG Zhao-Chen, YANG Zhen-Jing, YAN Shun, NI Jian. Vegetation Changes and Environmental Evolution in the Urumqi River Head, Central Tianshan Mountains Since 3.6 ka BP: a Case Study of Daxigou Profile[J]. J Integr Plant Biol., 2004, 46(6): 655-667.