7Rees W E. Ecological footprint and appropriated carrying capacity:what urban economics leaves out [J]. Environment and Urbanization, 1992, 4(2): 121 - 130.
8Wackernagel M and Rees W E. Our Ecological Footprint: Reducing Human Impact on the Earth [ M ] . Gabriola Island: New SocietyPublishers, 1996.
9Erb K-H. Actual land demand of Austria 1926 - 2000: a variation on ecological footprint assessments [J]. Land Use Policy, 2004, 21(3): 247 - 259.
10Haberl H, Erb K-H, Krausmann F. How to calculate and interpret ecological footprints for long periods of time: the case of Austria 1926- 1995[J]. Ecological Economics, 2001, 38:25-45.
