4Tian Min Guo,Bi Hao Wu,You Hai Zhu.A review on the gas hydrate research in China.Journal of Petroleum Science and Engineering,2004,41(1/3):11-20
5Hatje.W,Ruhl.M,Huttl.R.F,et al.Use of Biomass for power and heat generation:possibilities and limits.Forests and Energy,1st Hanover EXPO 2000 World Forest Forurn Selected papers,Ecological Engineering,2000,16(1):41-49