1. Allen RG, Pereira LS, Raes D, Smith M (1998) Crop evapotranspiration––guidelines for computing crop water requirements. FAO Irrigation and Drainage Paper 56. FAO, Rome, 300 pp
2. Andrén O, Kätterer T (1997) ICBM: the introductory carbon balance model for exploration of soil carbon balances. Ecol Appl 7:1226–1236
3. Andrén O, Kätterer T (2001) Basic principles for soil carbon sequestration and calculating dynamic country-level balances including future scenarios. In: Lal R, Kimble JM, Follett RF, Stewart BA (eds) Assessment methods for soil carbon. Lewis Publishers, pp 495–511
4. Andrén O, Lindberg T, Paustian K, Rosswall T (eds) (1990) Ecology of arable land––organisms, carbon and nitrogen cycling. Ecol Bull (Copenhagen) 40, ca 210 pp
5. Andrén O, Kätterer T, Karlsson T (2004) ICBM regional model for estimations of dynamics of agricultural soil carbon pools. Nutr Cycl Agroecosys 70:231–239