1. Aber JD (1997) Why don’t we believe the models. Bull Ecol Soc Am 78:232–233
2. Aduan RE, Klink CA, Davidson EA (2000) Carbon budget in different components of a woody savanna in Brazilian Cerrado. In: Proceeding of I LBA Scientific Conference, Belém, Para, 96
3. Bai ZG, Dent DL (2007) Global assessment of Land degradation and improvement: pilot study in Kenya. ISRIC Report 2007/03, World Soil Information (ISRIC), Wageningen
4. Bai ZG, Dent DL, Olsson L, Schaepman ME (2008) Proxy global assessment of land degradation. Soil Use Manag 24:223–234
5. Baldi G, Nosetto M, Aragón R, Aversa F, Paruelo J, Jobbágy E (2008) Long-term satellite NDVI data sets: evaluating their ability to detect ecosystem functional changes in South America. Sensors 8:5397–5425