1Carmel Y and Kadmon R. Effects of grazing and topography on long-term vegetation changes in a Mediterranean ecosystem in Israel [J]. Plant Ecology, 1999, 145 (2) :243-254.
2Urban D L, Miller C, Halpin P N and Stephenson N L. Forest gradient response in Sierran landscapes: the physical template[J]. Landscape Ecology, 2000,15(7):603-620.
3Miller J R, Joyce L A, Knight R L and Rudy W. Forest roads and landscape structure in the southern Rocky Mountains[J].Landscape Ecology, 1996, 11 (2) :115-127.