1. Anderson, J.M. and J.S.I. Ingram: (1989).Tropical Soil Biology and Fertility: A Handbook of Methods. CAB International, Wallingford, UK.
2. Ayanaba, S.B. Tuckwell and D.S. Jenkinson: 1976,Soil Biol. and Biochem. 8, 519?525.
3. Ayodele, O.J.: 1986,Biol. Fertil. Soils 2, 519?525.
4. Bouwman A.F.: 1990, Exchange of Greenhouse Gasses between Terrestrial Ecosystems and the Atmosphere in A.F. Bouwman (ed.)Soils and the Greenhouse Effect, J. Wiley and Sons, pp. 59?127.
5. Brown S. and A.E. Lugo: 1982,Biotropica 14, 161?187.