1. Allison, F.E. 1973. Soil Organic Matter and its Role in Crop Production. Elsevier, New York, NY.
2. Aronson, J., Floret, C., Le Floc’h, E., Ovalle, C. and Pontanier, R. 1993a. Restoration and rehabilitation of degraded ecosystems in arid and semi-arid lands. I. A view from the south. Restoration Ecology I, 8–17.
3. Aronson, J., Floret, C., Le Floc’h, E., Ovalle, C. and Pontanier, R. 1993b. Restoration and rehabilitation of degraded ecosystems in arid and semi-arid lands. II. Case studies in southern Tunisia, central Chile and northern Cameroon. Restoration Ecology 1, 168–187.
4. Barrow, C.J. 1991. Land Degradation. Cambridge University Press, New York, NY.
5. Belsky, A.J. 1986. Population and community processes in a mosaic grassland in the Serengeti, Tanzania J. Ecol. 74, 841–856.