Xiong Feal (1996) Screening of freshwater algae (Chlorophyta, Chromophyta) for ultraviolet-B sensitivity of the photosynthetic apparatus. 148 Journal of Plant Physiology, 42-48.
Xiong Leal (1998) Chronology development and climate response analysis of different New Zealand pink pine (Halocarpus biformis) tree-ring parameters. 28 Canadian Journal of Forest Research, 566-573.
Xu D, Yan H (2001) A study of the impacts of climate change on the geographic distribution of Pinus koraiensis in China. 27 (2-3) Environment International, 201-205.