1. Allen RG, Pruitt WO (1986) Rational use of the FAO Blaney-Criddle formula. J Irrig Drain Eng 112(IR2):139–155
2. Anonymous (2008) Manual for describing land degradation. Compiled by the Agricultural University of Athens, Department of Natural Resources Development and Agricultural Engineering (NRDAE) (ed)
http://www.desirehis.eu/wimba/WP2.1%20Indicators%20manual/page_01.htm
3. Berry L, Ford RB (1977) Recommendations for a system to monitor critical indicators in areas prone to desertification. Program for International Development, Clark University, Worcester
4. Boeken B (2008) The role of seedlings in the dynamics of dryland ecosystems – their response to and involvement in dryland heterogeneity, degradation and restoration. In: Leck M, Parker VT, Simpson R (eds) Seedling ecology and evolution. Cambridge University Press, Cambridge, pp 307–330
5. Carmi GP, Berliner P (2009) The effect of soil crust on the generation of runoff on small plots in an arid environment. Catena 74(1):37–42