1. Akaike, H., 1973. Information theory and an extension of the maximum likelihood principle. In: Petrov, B., Csaki, F. (Eds.), Second International Symposium on Informatic Theory. Akademial, Kiado.
2. Identifying critical limits for soil quality indicators in agro-ecosystems;Arshad;Agric. Ecosyst. Environ.,2002
3. Buondonno, C., Danise, B., Leone, A.P., Tedeschi, P., Terribile, F., 1989. Carta dei suoli della Comunità Montana “Fortore beneventano”. CNR – ISPAIM, Publication no. 120, Reprint by Ann. Fac. Agric. Univ. Napoli, vol. 23. pp. 21–33.
4. GIS and geostatistics: essential partners for spatial analysis;Burrough;Environ. Ecol. Stat.,2001
5. Deriving indicators of soil degradation from soil aggregation studies in southeastern Spain and southern France;Cammeraat;Geomorphology,1998