5Wackernagel M, Onisto L, Bello P, et al. National natural capital accounting with the ecological footprint concept [J]. Ecological Economics, 1999, 29 (3): 375-390.
6Hardi P, Barg S, Hodge T,et al. Measuring sustainable development: review of current practice [M]. Ottawa : Industry Canada,1997:1-2, 49-51.