1. Increased plant growth in the northern high latitudes from 1981 to 1991
2. Recent Signal of Vegetation Change in Siberia Using Satellite Data
3. 3) Ma, M. G., Dong, L. X., and Wang, X. M. (2003) Study on the dynamically monitoring and simulating the vegetation cover in northwest China in the past 21 years. Journal of Glaciology and Geocryology, 25(2): 232-236. (in Chinese with English abstract).
4. 4) 日本リモートセンシング研究会 (1994) 図解リモートセンシング,日本測量協会,pp. 226.
5. 5) Wang, H., Li, X. B., Li, X. and Ying, G. (2007) The variability of vegetation growing season in the northern China based on NOAA NDVI and MSAVI from 1982 to 1999. Acta Ecologica Sinica., 27(2): 504-515. (in Chinese with English abstract).