2[1]Richard Eba′a Atyi, Markku Simula. Forest certification:pending challenges for tropical timber,ITTO Technical Series No 19,2002
3[2]Vilhunen L,E H Juslin & K Forsyth .Forest certification update for the ECE Region, Summer 2001. Geneva Timber and Forest Discussion Papers. ECE/TIM/DP/23.New York and Geneva.2001
4[3]Baharuddin H G & M Simula.Timber Certification:Profress and Issues.ITTO, Yokohama.1998
6[5]Kristiina A Vogt, Bruce C Larson, John C Gordon, Daniel J Vogt, Anna Fanzeres. Forest certification:Roots, Issues, Challenges, and Benefits, CRC Press LLC,2000
7[6]Vallejo N & P Hausemann. PEFC An Analysis. WWF Discussion Paper. WWF European Forest Team, Zurich.2001
8[7]Synnott T.Forest Stewardship Council position on mutual recognition.The Second International Seminar on the Mutual Recognition of Credible Certification Systems. Brussels,28～29 November 2000
9FERN. Footprints in the forest: current practice and future challenges in forest certification. 2004.
10FERN. Behind the logo: An environmental and social assessment of forest certification schemes. 2001.
