1. Wang Sumin, Yu Yuanshen, Wu Ruijinget al., Daihai Lake and Climatic Change (in Chinese), Hefei: Chinese Sci. & Tech. Univ. Press, 1990, 142–147.
2. Yu Tianren, Wang Zhengquan,Soil Analytical Chemistry (in Chinese), Beijing: Science Press, 1980, 15–17.
3. Qian Junlong, Zhang Liandi, Yue Meilin, Measure of TN and TP by persulfate oxidation-ultraviolet spectrophotometry,Soils (in Chinese), 1990, 22(5): 258.
4. Swain, E. B., Measurement and interpretation of sedimentary pigment,Freshwater Biology, 1985, 15: 53.
5. Wang Yunfei, Wang Sumin, Xue Binet al., Sedimentary evidence of Zoige palaeo-lake being captured by Yellow River,Chinese Science Bulletin, 1995, 40(8): 723.