8Abdi E,Majnounian B , Darvishsefat A ,et al. A GIS - MCE basedmodel for forest road plauning[J] . Journal of Forest Science ,2009,5 5 (4 ) : 171 -176.
9Girvetz E , Shilling F. Decision support for road system analysis andmodification on the Tahoe National Forest[J] . Environmental Management,2003,32(2) ;218 -233.
