1. Anderson, J. A. R. 1972. Trees of Peat Swamp Forests of Sarawak. Forest Department, Sarawak.
2. Breiman, L., Friedman, J. H., Olshen, R. A. and Stone, C. J. 1984. Classification and Regression Trees. Wadsworth, Belmont, CA.
3. Breiman, L., Friedman, J. H., Olshen, R. A. and Stone, C. J. 1993. Regression Trees. Chapman & Hall/CRC, Boca Raton, FL.
4. Soil Respiration in a Winter Wheat Ecosystem
5. Seasonal patterns of methane uptake and carbon dioxide release by a temperate woodland soil