7Lubchenco J. Entering the century of the environment:A new social contract for science. Science[J]. 1998, 279:279-491.
8Carins J. Protecting the delivery of ecosystem services[J]. Ecosytem Health, 1997, 3(3): 185-194.
9Seidl A F, Moraes A S. Global valuation of ecosystem services: application to the Pantanal da Nhecolandia[J].Brazil, Ecological Economics, 2000, 33(1): 1-6.
