1. Nitrogen management in the “De Marke” dairy farming system;Aarts;Nutr. Cycl. Agroecosyst.,2000
2. The enigma of soil nitrogen balance sheets;Allison;Adv. Agronomy,1955
3. Water quality modeling: a review of the analysis of uncertainty;Beck;Water Resour. Res.,1987
4. Clark, F.E., 1981. The nitrogen cycle viewed with poetic license. In: Clark, F.E., Rosswall, T. (Eds.). Terrestrial Nitrogen Cycles: Processes, Ecosystem Strategies and Management Impacts. Ecol. Bull. No. 33, Stockholm, pp. 13–24.
5. The Double Green Revolution: Food for All in the 21st Century;Conway,1997