1LEBEL L G, STUART W B. Technical efficiency evaluation of logging contractors using a nonparametric mode 1 [ J ]. Inter Journal of Forest Engineering, 1998, 9 (2) : 15 - 24.
2VIITALA E J, JANNINCN H. Measuring the efficiency of public forestry organizations [J]. Forest Science, 1998, 44 (3) : 298- 307.
3NEDA S, TARANEH S. Productivity and efficiency assessment o fthe wood industry: A review with a focus on Canada [J]. Forest Products Society, 2006, 56 ( 11 / 12) : 25 - 32.
4COPPER W W, LIS, SEIFORD L M, et al. Sensitivity and stability analysis in dea; some recent development [J]. Journal of Productivity Analysis, 2001, 15 (3) : 217 -246.