8Costanza R,d'Arge R,de Groot R,et al.1997.The value of the world's ecosystem services and natural capital.Nature,86:253-260.
9Kerr YH,Lagouarde JP,Imbernon J.1992.Accurate land surface temperature retrieval from AVHRR data with use of an improved split window algorithm.Remote Sensing of Environment,41:197-209.
10Sala OE,Paruelo JM.1997.Ecosystem services in grassland// Daily GC,ed.Nature's Services:Societal Dependence on Natural Ecosystems.Washington DC:Island Press:237-254.