3Seigo Yamazaki. Kondo Nishida. The bare landsnow cover as well as the vegetation covered the soil freezingthickness which overwhelmed [ J ]. Japanese Snow Ice Magazine, 1997 ( 3 ) :25 - 29.
3Huang J, Wang R, Zhang H. Analysis of patterns and ecological security trend of modern oasis landscapes in Xinjiang, China [J]. Environmental monitoring and assessment, 2007,134 (1/3) :411-419.
4Giupponi C, Ramanzin M, Sturaro E, et al. Climate and land use changes, biodiversity and agri-environmental measures in the Belluno province, Italy [J]. Environ- mental SciencePoliey,2006,9(2) :163-173.
