1. Basch, G., Tebrügge, F., 2001. Report from the Project LIFE 99E308. Co-ordination of activities and technology transfer actions to reduce water contamination, erosion and emissions of CO2 from agricultural land in Europe. In ECAF page: http://www.ecaf.org.
2. Evaluación de sistemas de labranza en el Centro-Sur Bonaerense;Bergh,1998
3. Rainfall-runoff Modelling. The Primer;Beven,2000
4. Bravo, C.A., 2005. Influencia de algunos factores edáficos en la producción vegetal bajo diferentes sistemas agrícolas en el sur de España. Unpublished Ph.D. Dissertation. Department of Agronomy, University of Cordoba, Spain.
5. Surface soil degradation and soil productivity, restoration and maintenance;Bruce;Soil Sci. Soc. Am. J.,1995