2M. L. Nyknen. Factors affecting snow damage of tree with particular reference to European conditions. Silva Fennica. 1997,31(2): 193-213.
3N. G. Ulanova. The effects of windthrow on forests at different spatial scales[J]. For Ecol Manag. 2000, 135(1-3): 155-167.
4F. G Wang, Y. J. Xu. Hurricane Ktrina-induced forest damage in relation to ecological factors at landscape scale[J]. Eviron Moint Access. 2009,156( 1-4):491 -507.
